Statement to Certificateholder

Distribution Information

Deal Information

1. Distribution Summary

Deal Name:

Residential Asset Securities Corp, 2006-KS4

2. Factor Summary

Asset Type:

Home Equity Mortgage Asset Backed Pass-Through
Certificates

3. Components Information

(Not Applicable)

Closing Date:

05/30/2006

4. Interest Summary

First Distribution Date:

06/25/2006

5. Other Income Detail

Determination Date:

06/20/2006

6. Interest Shortfalls, Compensation and Expenses

Distribution Date:

06/26/2006

Record Date:

7. Prepayment Interest and Basis Risk/Net WAC Shortfall Amounts

Book-Entry:

06/23/2006

8. Collateral Summary

Definitive:

05/31/2006

9. Repurchase Information

Trustee:

Us Bank, Inc.

Main Telephone:

651-495-7000

10. Loan Status Report (Delinquencies)

11. Deal Delinquencies (30 Day Buckets)

GMAC-RFC

Bond Administrator:

Perry Bons

12. Loss Mitigation and Servicing Modifications

Telephone:

818-260-1441

13. Losses and Recoveries

Pool(s) :

40350,40351

14. Credit Enhancement Report

15. Distribution Percentages

(Not Applicable)

16. Overcollateralization Summary

17. Excess Cash Flow, Overcollateralization
Provisions and Derivative Amounts

18. Performance Tests

19. Lender Paid Mortgage Insurance

(Not Applicable)

20. Comments

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 1 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



	1. Distribution Summary

										Beginning
							Original Face Value				Pass-Through						Principal			Interest		Total Distribution		Principal Loss					Interest		Deferred Interest			Ending Notional/ Principal Balance (1)-(3)-(6)+(8)=(9)
		Class		CUSIP




									(1)				(2)		(3)				(4)				(5)	(6)				(7)				(8)			(9)

A-1				75406EAA9	282,245,000.00			282,245,000.00				5.13063000				1,801,018.45		1,086,071.00			2,887,089.45				0.00	0.00				0.00			280,443,981.55


A-2				75406EAB7	100,123,000.00			100,123,000.00				5.19063000				0.00		389,776.09			389,776.09				0.00	0.00				0.00			100,123,000.00


A-3				75406EAC5	104,883,000.00			104,883,000.00				5.24063000				0.00		412,239.75			412,239.75				0.00	0.00				0.00			104,883,000.00


A-4				75406EAD3	59,038,000.00			59,038,000.00				5.33063000				0.00		236,032.30			236,032.30				0.00	0.00				0.00			59,038,000.00


M-1				75406EAE1	26,614,000.00			26,614,000.00				5.37063000				0.00		107,200.46			107,200.46				0.00	0.00				0.00			26,614,000.00


M-2				75406EAF8	24,863,000.00			24,863,000.00				5.38063000				0.00		100,333.95			100,333.95				0.00	0.00				0.00			24,863,000.00


M-3				75406EAG6	14,358,000.00			14,358,000.00				5.39063000				0.00		58,049.00			58,049.00				0.00	0.00				0.00			14,358,000.00


M-4				75406EAH4	12,957,000.00			12,957,000.00				5.44063000				0.00		52,870.68			52,870.68				0.00	0.00				0.00			12,957,000.00


M-5				75406EAJ0	11,906,000.00			11,906,000.00				5.48063000				0.00		48,939.29			48,939.29				0.00	0.00				0.00			11,906,000.00


M-6				75406EAK7	11,556,000.00			11,556,000.00				5.55063000				0.00		48,107.31			48,107.31				0.00	0.00				0.00			11,556,000.00


M-7				75406EAL5	10,506,000.00			10,506,000.00				5.99063000				0.00		47,203.17			47,203.17				0.00	0.00				0.00			10,506,000.00


M-8				75406EAM3	9,805,000.00			9,805,000.00				6.19063000				0.00		45,524.35			45,524.35				0.00	0.00				0.00			9,805,000.00


M-9				75406EAN1	7,004,000.00			7,004,000.00				7.09063000				0.00		37,247.08			37,247.08				0.00	0.00				0.00			7,004,000.00


M-10				75406EAP6	4,903,000.00			4,903,000.00				7.59063000				0.00		27,912.64			27,912.64				0.00	0.00				0.00			4,903,000.00


B				75406EAQ4	7,003,000.00			7,003,000.00				7.59063000				0.00		39,867.89			39,867.89				0.00	0.00				0.00			7,003,000.00


SB				75406EAR2	12,606,078.88			12,606,078.88				0.00000000				0.00		1,932,604.87			1,932,604.87				0.00	0.00				582.54			12,606,661.42


R-I					0.00			0.00				0.00000000				0.00		0.00			0.00				0.00	0.00				0.00			0.00


R-II					0.00			0.00				0.00000000				0.00		0.00			0.00				0.00	0.00				0.00			0.00


R-III					0.00			0.00				0.00000000				0.00		0.00			0.00				0.00	0.00				0.00			0.00


			Deal Totals			700,370,078.88		700,370,078.88						1,801,018.45				4,669,979.83			6,470,998.28			0.00			0.00			582.54			698,569,642.97

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 2 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



2. Factor Summary
Amount /Original Amount per $1000 unit)

	Class			CUSIP		Beginning Notional/ Principal Balance Factor	Principal Distribution Factor	Interest Distribution	Total Distribution	Deferred Interest Factor	Interest Shortfall	Ending Notional/ Principal Balance Factor




	A-1			75406EAA9	1,000.00000000		6.38104643	3.84797251	10.22901894	0.00000000	0.00000000	993.61895357

	A-2			75406EAB7	1,000.00000000		0.00000000	3.89297254	3.89297254	0.00000000	0.00000000	1,000.00000000

	A-3			75406EAC5	1,000.00000000		0.00000000	3.93047253	3.93047253	0.00000000	0.00000000	1,000.00000000

	A-4			75406EAD3	1,000.00000000		0.00000000	3.99797249	3.99797249	0.00000000	0.00000000	1,000.00000000

	M-1			75406EAE1	1,000.00000000		0.00000000	4.02797250	4.02797250	0.00000000	0.00000000	1,000.00000000

	M-2			75406EAF8	1,000.00000000		0.00000000	4.03547239	4.03547239	0.00000000	0.00000000	1,000.00000000

	M-3			75406EAG6	1,000.00000000		0.00000000	4.04297256	4.04297256	0.00000000	0.00000000	1,000.00000000

	M-4			75406EAH4	1,000.00000000		0.00000000	4.08047233	4.08047233	0.00000000	0.00000000	1,000.00000000

	M-5			75406EAJ0	1,000.00000000		0.00000000	4.11047287	4.11047287	0.00000000	0.00000000	1,000.00000000

	M-6			75406EAK7	1,000.00000000		0.00000000	4.16297248	4.16297248	0.00000000	0.00000000	1,000.00000000

	M-7			75406EAL5	1,000.00000000		0.00000000	4.49297259	4.49297259	0.00000000	0.00000000	1,000.00000000

	M-8			75406EAM3	1,000.00000000		0.00000000	4.64297297	4.64297297	0.00000000	0.00000000	1,000.00000000

	M-9			75406EAN1	1,000.00000000		0.00000000	5.31797259	5.31797259	0.00000000	0.00000000	1,000.00000000

	M-10			75406EAP6	1,000.00000000		0.00000000	5.69297165	5.69297165	0.00000000	0.00000000	1,000.00000000

	B			75406EAQ4	0.00000000		0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

	SB		1	75406EAR2

	R-I				0.00000000		0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

	R-II				0.00000000		0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

	R-III				0.00000000		0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

	1	Factors not reported for OC Classes



	Deal Factor :			99.74293078%


	Group I Factor :			99.74733921%


	Group II Factor :			99.74224043%

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 3 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



4. Interest Summary
The following section only reports information for classes that have accrued interest for this distribution.

Class		Accrual Period			Accrual Methodology	Beginning Notional/Principal Balance		Pass- Through Rate	Optimal Interest		Interest Loss			Deferred Interest		Interest Shortfall Amount		Other Income		Interest Distribution (1)-(2)-(3)- (4)+(5)=(6)		Accrued Certificate Interest Remaining Unpaid






		Start		End						(1)		(2)			(3)		(4)		(5)		(6)
A-1	05/30/2006		06/25/2006		Actual/360		282,245,000.00	5.13063000	1,086,071.00		0.00		0.00			0.00		0.00		1,086,071.00		0.00	0.00

A-2	05/30/2006		06/25/2006		Actual/360		100,123,000.00	5.19063000	389,776.09		0.00		0.00			0.00		0.00		389,776.09		0.00	0.00

A-3	05/30/2006		06/25/2006		Actual/360		104,883,000.00	5.24063000	412,239.75		0.00		0.00			0.00		0.00		412,239.75		0.00	0.00

A-4	05/30/2006		06/25/2006		Actual/360		59,038,000.00	5.33063000	236,032.30		0.00		0.00			0.00		0.00		236,032.30		0.00	0.00

M-1	05/30/2006		06/25/2006		Actual/360		26,614,000.00	5.37063000	107,200.46		0.00		0.00			0.00		0.00		107,200.46		0.00	0.00

M-2	05/30/2006		06/25/2006		Actual/360		24,863,000.00	5.38063000	100,333.95		0.00		0.00			0.00		0.00		100,333.95		0.00	0.00

M-3	05/30/2006		06/25/2006		Actual/360		14,358,000.00	5.39063000	58,049.00		0.00		0.00			0.00		0.00		58,049.00		0.00	0.00

M-4	05/30/2006		06/25/2006		Actual/360		12,957,000.00	5.44063000	52,870.68		0.00		0.00			0.00		0.00		52,870.68		0.00	0.00

M-5	05/30/2006		06/25/2006		Actual/360		11,906,000.00	5.48063000	48,939.29		0.00		0.00			0.00		0.00		48,939.29		0.00	0.00

M-6	05/30/2006		06/25/2006		Actual/360		11,556,000.00	5.55063000	48,107.31		0.00		0.00			0.00		0.00		48,107.31		0.00	0.00

M-7	05/30/2006		06/25/2006		Actual/360		10,506,000.00	5.99063000	47,203.17		0.00		0.00			0.00		0.00		47,203.17		0.00	0.00

M-8	05/30/2006		06/25/2006		Actual/360		9,805,000.00	6.19063000	45,524.35		0.00		0.00			0.00		0.00		45,524.35		0.00	0.00

M-9	05/30/2006		06/25/2006		Actual/360		7,004,000.00	7.09063000	37,247.08		0.00		0.00			0.00		0.00		37,247.08		0.00	0.00

M-10	05/30/2006		06/25/2006		Actual/360		4,903,000.00	7.59063000	27,912.64		0.00		0.00			0.00		0.00		27,912.64		0.00	0.00

B	05/30/2006		06/25/2006		Actual/360		7,003,000.00	7.59063000	39,867.89		0.00		0.00			0.00		0.00		39,867.89		0.00	0.00

SB	05/01/2006		05/31/2006		Actual/360		12,606,078.88	0.00000000	0.00		0.00		582.54			0.00		1,932,604.87		1,932,604.87		0.00	0.00

Deal Totals						700,370,078.88			2,737,374.96		0.00		582.54			0.00		1,932,604.87		4,669,979.83		0.00



	Current Index Rates

Index Type		Rate		Classes


USLIB TEL 25 -2BD		5.08125000	A-1, A-2, A-3, M-1, M-3, M-5, M-7, M-9, B, M-10, M-8, M-6, M-4, M-2, A-4


LIBOR shows 5.08125%, but should be 5.09063%.

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 4 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006

5. Other Income Detail

Class

Prepayment Charges

Remaining Excess Cash Flow
and OC Release Amount

Other Income Distributiion

(1)

(2)

(1) + (2) = (3)

20,436.55

1,912,168.32

1,932,604.87

Deal Totals

20,436.55

1,912,168.32

1,932,604.87


6. Interest Shortfalls, Compensation and Expenses

			Current Prepayment Interest Shortfall Amount		Compensating Interest			Net Prepayment Interest Shortfall Amount (1) - (2)=(3)		Civil Relief Act	Civil Relief Act	Compensation				Advances			Allowable Expenses per	Non-Recoverable






			(1)			(2)			(3)			Subservicer		Master		Subservicer		Master



	Group I	553.90		553.90			0.00			0	0.00		28,834.89		3,930.73		9,860.09	0.00	0.00	0.00

	Group II	1,252.36		1,252.36			0.00			0	0.00		224,216.79		24,617.43		67,912.68	0.00	0.00	0.00

	Deal Totals	1,806.26		1,806.26			0.00			0	0.00		253,051.68		28,548.16		77,772.77	0.00	0.00	0.00

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 5 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



7. Prepayment Interest and Basis Risk/Net WAC Shortfall Amounts

(A) Prepayment Interest Shortfall Amounts														(B) Basis Risk/Net WAC Shortfall Amounts

Class			Current		Prior Unpaid		Prior Unpaid Accrued Interest		Total Paid		Remaining Unpaid (1)+(2)+(3)-(4)=(5)		Current Period Uncompensated			Prior Unpaid		Prior Unpaid Accrued Interest		Total Paid		Remaining Unpaid (1)+(2)+(3)-(4)=(5)




			(1)		(2)		(3)		(4)		(5)		(1)			(2)		(3)		(4)		(5)

	A-1		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	A-2		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	A-3		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	A-4		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-1		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-2		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-3		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-4		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-5		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-6		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-7		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-8		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-9		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	M-10		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	B		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	SB		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	R-I		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	R-II		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

	R-III		0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00


	Deal Totals	0.00		0.00		0.00		0.00		0.00		0.00			0.00		0.00		0.00		0.00

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 6 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006

8. Collateral Summary

A. Loan Count and Balances

Original Loan Count/
Scheduled Principal
Balance

Beginning Loan Count/
Scheduled Principal
Balance

Curtailments

Payoffs

Total Repurchases

Principal Portion
of Losses

Ending Loan Count/
Scheduled Principal
Balance

Count

Balance

Count

Balance

Count

Amount

Count

Amount

Count

Amount

Count

Amount

Count

Balance

Group I

990

94,826,418.81

990

94,826,418.81

190

63,356.33

29,191.41

76,429.39

0.00

987

94,586,829.63

Group II

3,830

605,543,660.07

3,830

605,543,660.07

474

101,213.72

1,157,841.52

0.00

3,824

603,982,813.34

Deal Totals

4,820

700,370,078.88

4,820

700,370,078.88

664

164,570.05

1,187,032.93

76,429.39

0.00

4,811

698,569,642.97

B. Weighted Averages

Beginning

Ending

Ending
Weighted
Average
Remaining
Amortization
Term

Ending
Weighted
Average
Months to
Maturity

Beginning
Weighted
Average
Net
Mortgage

Ending
Weighted
Average
Net
Mortgage

Beginning
Weighted
Average
Unmodified
Net
Mortgage

Net
Weighted
Average
Cap Rate

Weighted
Average
Net Rate

Group I

8.47903007

8.47565611

347.90

323.10

8.04942253

8.04623982

8.04942253

N/A

Group II

8.41776211

8.41982197

361.55

356.91

7.90927453

7.91135452

7.90927453

N/A

Deal Totals

8.42605747

8.42738195

359.70

352.33

7.92824983

7.92961809

7.92824983

N/A

C. Constant Prepayment Rate

1 Month CPR

3 Month CPR

6 Month CPR

12 Month CPR

Life CPR

Group-I

2.12%

Group-II

2.47%

Deal Totals

2.42%

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 7 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



9. Repurchases

			Breaches Of Representations			ARM Conversions		Optional Repurchases of Defaulted Loans		Others		Total (1)+(2)+(3)+(4)=(5)
				(1)	(2)		(3)			(4)		(5)
		Count				0			0		1		1
				0


	Group I
		Scheduled Balance		0.00		0.00			0.00		76,429.39			76,429.39


		Count				0			0		0		0
				0


	Group II
		Scheduled Balance		0.00		0.00			0.00		0.00			0.00



		Count		0		0			0		1		1
	Deal Totals


		Scheduled Balance		0.00		0.00			0.00		76,429.39		76,429.39

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 8 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006


10. Loan Status Report
													Delinquency Calculation Method: Office of Thrift Supervision

					Current / Delinquent																	Bankruptcy								Foreclosure								REO																Total
	Deal Totals

		Count								Scheduled Balance					Count				Scheduled Balance				Count				Scheduled Balance					Count			Scheduled Balance				Actual Balance						Count								Scheduled Balance

	Current						4,742				687,358,751.88				2			425,008.28								0			0.00				0				0.00							0.00						4,744		687,783,760.16

	30 days					51					7,570,225.74				1			23,193.48								0			0.00				0				0.00							0.00						52		7,593,419.22

	60 days					16					3,192,463.59				0			0.00								0			0.00				0				0.00							0.00						16		3,192,463.59

	90 days					0					0.00				0			0.00								0			0.00				0				0.00							0.00						0		0.00

	120 days					0					0.00				0			0.00								0			0.00				0				0.00							0.00						0		0.00

	150 days					0					0.00				0			0.00								0			0.00				0				0.00							0.00						0		0.00

	180 days					0					0.00				0			0.00								0			0.00				0				0.00							0.00						0		0.00

	181+ days					0					0.00				0			0.00								0			0.00				0				0.00							0.00						0		0.00

	Total							4,809			698,121,441.21				3		448,201.76								0			0.00			0					0.00					0.00						4,812				698,569,642.97


	Current			98.55%								98.40%			0.04%						0.06%				0.00%				0.00%				0.00%		0.00%							0.00%								98.59%		98.46%

	30 days					1.06%					1.08%				0.02%						0.00%				0.00%				0.00%				0.00%		0.00%							0.00%							1.08%			1.09%

	60 days					0.33%					0.46%				0.00%						0.00%				0.00%				0.00%				0.00%		0.00%							0.00%							0.33%			0.46%

	90 days					0.00%					0.00%				0.00%						0.00%				0.00%				0.00%				0.00%		0.00%							0.00%							0.00%			0.00%

	120 days					0.00%					0.00%				0.00%						0.00%				0.00%				0.00%				0.00%		0.00%							0.00%							0.00%			0.00%

	150 days					0.00%					0.00%				0.00%						0.00%				0.00%				0.00%				0.00%		0.00%							0.00%							0.00%			0.00%

	180 days					0.00%					0.00%				0.00%						0.00%				0.00%				0.00%				0.00%		0.00%							0.00%						0.00%				0.00%

	181+ days					0.00%					0.00%				0.00%					0.00%					0.00%				0.00%				0.00%		0.00%								0.00%						0.00%			0.00%

	Total		99.94%						99.94%					0.06%		0.06%								0.00%				0.00%			0.00%			0.00%						0.00%						100.00%					100.00%

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 9 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



			Current / Delinquent											Bankruptcy						Foreclosure					REO											Total
Group I

	Count						Scheduled Balance							Count			Scheduled Balance	Count				Scheduled Balance					Count			Scheduled Balance	Actual Balance				Count					Scheduled Balance


Current						971						93,360,683.96		1		67,508.30					0			0.00				0		0.00			0.00					972			93,428,192.26

30 days					13					1,017,007.94			1			23,193.48					0			0.00				0		0.00			0.00					14			1,040,201.42

60 days					2					118,435.95			0			0.00					0			0.00				0		0.00			0.00					2			118,435.95

90 days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

120 days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

150 days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

180 days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

181+ days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

Total					986					94,496,127.85			2			90,701.78				0				0.00				0		0.00				0.00				988			94,586,829.63


Current				98.28%				98.70%						0.10%		0.07%				0.00%				0.00%				0.00%		0.00%				0.00%				98.38%			98.78%

30 days				1.32%							1.08%		0.10%			0.02%				0.00%				0.00%				0.00%		0.00%				0.00%				1.42%				1.10%

60 days				0.20%							0.13%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.20%		0.13%

90 days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

120 days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

150 days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

180 days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

181+ days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

Total		99.80%							99.90%				0.20%		0.10%				0.00%				0.00%			0.00%			0.00%			0.00%					100.00%		100.00%

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 10 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



			Current / Delinquent											Bankruptcy						Foreclosure					REO											Total
Group II

	Count						Scheduled Balance							Count			Scheduled Balance	Count				Scheduled Balance					Count			Scheduled Balance	Actual Balance				Count					Scheduled Balance


Current						3,771						593,998,067.92		1		357,499.98					0			0.00				0		0.00			0.00					3,772			594,355,567.90

30 days					38					6,553,217.80			0			0.00					0			0.00				0		0.00			0.00					38			6,553,217.80

60 days					14					3,074,027.64			0			0.00					0			0.00				0		0.00			0.00					14			3,074,027.64

90 days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

120 days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

150 days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

180 days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

181+ days					0					0.00			0			0.00					0			0.00				0		0.00			0.00					0			0.00

Total					3,823					603,625,313.36			1			357,499.98				0				0.00				0		0.00				0.00				3,824			603,982,813.34


Current				98.61%				98.35%						0.03%		0.06%				0.00%				0.00%				0.00%		0.00%				0.00%				98.64%			98.41%

30 days				0.99%							1.09%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.99%				1.09%

60 days				0.37%							0.51%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.37%		0.51%

90 days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

120 days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

150 days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

180 days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

181+ days				0.00%							0.00%		0.00%			0.00%				0.00%				0.00%				0.00%		0.00%				0.00%				0.00%		0.00%

Total		99.97%							99.94%				0.03%		0.06%				0.00%				0.00%			0.00%			0.00%			0.00%					100.00%		100.00%

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 11 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



11. Delinquency Data

			Totals				Totals					Totals					Totals					Totals
		Count % Count		Balance % Balance		Count % Count		Balance % Balance			Count % Count		Balance % Balance			Count % Count		Balance % Balance			Count % Count		Balance % Balance

			52	7,593,419.22			0		0.00			0		0.00			0		0.00			0		0.00
	1 Month				13 Months					25 Months					37 Months					49 Months


			1.08%	1.09%			0.00%	0.00%				0.00%		0.00%			0.00%		0.00%			0.00%		0.00%


			16	3,192,463.59			0		0.00			0		0.00			0		0.00			0		0.00
	2 Months				14 Months					26 Months					38 Months					50 Months


			0.33%	0.46%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%


			0	0.00			0		0.00			0		0.00			0		0.00			0		0.00
	3 Months				15 Months					27 Months					39 Months					51 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%


			0	0.00			0		0.00			0		0.00			0		0.00			0		0.00
	4 Months				16 Months					28 Months					40 Months					52 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%


			0	0.00			0		0.00			0		0.00			0		0.00			0		0.00
	5 Months				17 Months					29 Months					41 Months					53 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%


			0	0.00			0		0.00			0		0.00			0		0.00			0		0.00
	6 Months				18 Months					30 Months					42 Months					54 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%

			0	0.00			0		0.00			0		0.00			0		0.00			0		0.00
	7 Months				19 Months					31 Months					43 Months					55 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%

																	0		0.00
			0	0.00			0		0.00			0		0.00								0		0.00

	8 Months				20 Months					32 Months					44 Months					56 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%


			0	0.00			0		0.00			0		0.00			0		0.00			0		0.00
	9 Months				21 Months					33 Months					45 Months					57 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%


			0	0.00			0		0.00			0		0.00			0		0.00			0		0.00
	10 Months				22 Months					34 Months					46 Months					58 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%

														0.00					0.00
			0	0.00			0		0.00			0					0					0		0.00

	11 Months				23 Months					35 Months					47 Months					59 Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%

			0	0.00			0		0.00			0		0.00			0		0.00			0		0.00
	12 Months				24 Months					36 Months					48 Months					60+ Months


			0.00%	0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%			0.00%		0.00%

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 12 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



12. Loss Mitigation and Servicing Modifications


			Current			1 Payment			2 Payments				3+ Payments				Foreclosure				REO		Total

		Modification Type	Count		Scheduled Balance	Count		Scheduled Balance	Count			Scheduled Balance	Count		Scheduled Balance		Count	Scheduled Balance			Count	Scheduled Balance	Count	Scheduled Balance


Group I		Capitalizations	0		0.00	0		0.00		0		0.00		0		0.00	0		0.00	0		0.00	0	0.00


		Other Modifications	0		0.00	0		0.00		0		0.00		0		0.00	0		0.00	0		0.00	0	0.00



Group II		Capitalizations	0		0.00	0		0.00		0		0.00		0		0.00	0		0.00	0		0.00	0	0.00


		Other Modifications	0		0.00	0		0.00		0		0.00		0		0.00	0		0.00	0		0.00	0	0.00



		Capitalizations		0	0.00		0	0.00			0	0.00		0		0.00	0		0.00	0		0.00	0	0.00

	Deal Totals
		Other
				0	0.00		0	0.00			0	0.00		0		0.00	0		0.00	0		0.00	0	0.00



				Payoffs										Repurchases					Liquidations													Total

		Current Month					Cumulative						Current Month			Cumulative			Current Month				Cumulative								Current Month						Cumulative
Modification Type

		Count			Scheduled Balance		Count		Scheduled Balance			Count			Scheduled Balance	Count	Scheduled Balance	Count		Scheduled Balance			Count		Scheduled Balance					Count					Scheduled Balance		Count		Scheduled Balance


Group I	Capitalizations		0		0.00		0			0.00			0		0.00	0	0.00	0		0.00			0				0.00			0					0.00		0				0.00


	Other Modifications		0		0.00		0			0.00			0		0.00	0	0.00	0		0.00			0				0.00			0					0.00		0		0.00



Group II	Capitalizations		0		0.00		0			0.00			0		0.00	0	0.00	0		0.00			0				0.00			0					0.00		0				0.00


	Other Modifications		0		0.00		0			0.00			0		0.00	0	0.00	0		0.00			0				0.00			0					0.00		0		0.00



Deal Totals	Capitalizations		0		0.00		0			0.00			0		0.00	0	0.00	0		0.00		0				0.00			0					0.00		0				0.00


	Other Modifications

		0		0.00		0		0.00			0			0.00	0	0.00	0		0.00		0			0.00				0					0.00		0			0.00

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 13 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



13. Losses and Recoveries
A. Current Cycle Realized Losses

			Current Period Realized Losses		Liquidations					Charge-Offs					Servicing Modifications						Bankruptcy Losses	Total

		Loss Count			0								0					0			0				0


	Group I	Beginning Aggregate Scheduled Balance			0.00								0.00						0.00		0.00				0


		Principal Portion of Loss					0.00							0.00						0.00	0.00					0.00



		Interest Portion of Loss						0.00						0.00						0.00	0.00					0.00


		Total Realized Loss		0.00								0.00					0.00				0.00	0.00


		Loss Count			0								0					0			0				0


	Group II	Beginning Aggregate Scheduled Balance			0.00								0.00						0.00		0.00				0


		Principal Portion of Loss					0.00							0.00						0.00	0.00					0.00



		Interest Portion of Loss						0.00						0.00						0.00	0.00					0.00


		Total Realized Loss		0.00								0.00					0.00				0.00	0.00


		Loss Count							0				0					0			0						0


		Beginning Aggregate Scheduled Balance							0.00				0.00					0.00			0.00						0.00
	Deal Totals



		Principal Portion of Loss							0.00				0.00					0.00			0.00						0.00


		Interest Portion of Loss						0.00					0.00					0.00			0.00						0.00


		Total Realized Loss					0.00				0.00					0.00					0.00			0.00


B. Cumulative Realized Losses

			Cumulative Realized Losses		Liquidations					Charge-Offs					Servicing Modifications						Bankruptcy Losses	Total


	Group I	Loss Count			0								0					0			0				0


		Total Realized Loss				0.00								0.00						0.00	0.00					0.00



	Group II	Loss Count			0								0					0			0				0


		Total Realized Loss				0.00								0.00						0.00	0.00					0.00



	Deal Totals	Loss Count					0						0					0			0		0


		Total Realized Loss				0.00							0.00					0.00			0.00		0.00

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 14 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



C. Subsequent Recoveries

				Subsequent Recoveries	Current Period								Cumulative


			Subsequent Recoveries Count				0			0
		Group I
			Subsequent Recoveries					0.00			0.00


			Net Loss 1					0.00				0.00


			Net Loss % 2						0.00%					0.00%


			Subsequent Recoveries Count				0			0
		Group II
			Subsequent Recoveries					0.00			0.00


			Net Loss 1					0.00				0.00


			Net Loss % 2						0.00%					0.00%


			Subsequent Recoveries Count					0		0


			Subsequent Recoveries					0.00		0.00
		Deal Totals


			Net Loss 1					0.00		0.00



			Net Loss % 2			0.00%				0.00%

	1 Total Realized Loss less Subsequent Recoveries
	2 Net Loss % of Original Balance

D. Default Percentages

Default Loss Percentage

1 Month

3 Months

6 Months

12 Months

Life of Deal

Group

Monthly Default Rate

0.00%

Constant Default Rate

0.00%

Group

Monthly Default Rate

0.00%

Constant Default Rate

0.00%

Monthly Default Rate

0.00%

Deal Totals

Constant Default Rate

0.00%

1-Month MDR (Current Month) = SUM(Beginning Scheduled balances of liquidating loans) / [SUM(Beginning Scheduled loan balances)- SUM(Scheduled Principal payments)]
m-Month = 3, 6, 12, months or the life of deal to date
m-Month MDR(over m months in period where n is current month)= 1-[(1-MDRn-m+1) * (1-MDRn-m+2) *.* (1-MDR n-1) * (1-MDRn)]^(1/m)
CDRm = 1- [(1- MDRm)^12],where m is number of months in period

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 15 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006

14. Credit Enhancement Report

Hedge Agreements

Description

Provider

Termination
Date

Amount Received From Provider

Amount Paid to Provider

Swap Agreement

Bear, Stearns & Co., Inc.

01/25/2010

2,625,864.04

2,602,995.69



16. Overcollateralization Summary

		Prior Required Overcollateralization Amount	Beginning Overcollateralization Amount	Overcollateralization Increase/(Reduction) Amount		Ending Overcollateralization Amount		Current Required Overcollateralization Amount
	Deal Total
		0.00	12,606,078.88		582.54		12,606,661.42	12,606,661.42

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 16 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



17. Excess Cashflow, Overcollateralization and Derivative Amounts

	Excess Cashflow and Derivative Summary

	(1)	Scheduled Unmodified Net Interest	4,635,428.45


	(2)	Interest Losses	0.00


	(3)	Subsequent Recoveries	0.00


	(4)	Interest Adjustment Amount	0.00


	(5)	Credit Risk Management Fee	8,170.98


	(6)	Yield Maintenance/Swap Payment Amount - OUT	0.00


	(7)	Yield Maintenance/Swap Payment Amount - IN	22,868.34


	(8)	Certificate Interest Amount	2,737,374.95


	(9)	OC Reduction Amount	0.00


	(10)	Excess Cashflow Prior to OC Provisions	1,912,750.86


	Overcollateralization and Derivative Amounts

		Excess Cashflow Prior to OC Provisions	1,912,750.86


	(2)	Unreimbursed Principal Portion of Realized Losses	0.00


	(3)	Principal Portion of Realized Losses	0.00


	(4)	Overcollateralization Increase	582.54


	(5)	Prepayment Interest Shortfall	0.00


	(6)	Unpaid PPIS With Accrued Interest	0.00


	(7)	Basis Risk Shortfall Carry-Forward Amount	0.00


	(8)	Relief Act Shortfall	0.00


	(9)	Unreimbursed Realized Losses	0.00


	(10)	Swap Termination Payment Amount	0.00


	(11)	To Class SB Certificates	1,912,168.32

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 17 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006


18. Performance Tests


	Senior Balance Test

		Senior Certificate Beginning Balance - Actual Value	546,289,000.00

		Zero Balance	0.00

		Senior Certificate Beginning Balance = 0.00	False

	Current Distribution Date >= Target Distribution

		Current Distribution Period	1

		StepDownTarget Distribution Period	37

		Current Distribution Date >= Target Distribution Date	False

	Stepdown Date - Senior Enhancement Test

		Current Senior Enhancement Percent - Actual value	22.05665300%

		Specified Senior Enhancement Percent - Target value	44.00000000%

		Senior Enhance Pct >= Specified Senior Enhance Pct (Actual End Balance <= Target End Balance)	False

	StepDown Date and Senior Enhancement pass

		Current Distribution Date >= Target Distribution Date	False

		Senior Enhance Pct >= Specified Senior Enhance Pct (Actual End Balance <= Target End Balance)	False

		After StepDown Date and Senior Enh Percent >= Target Percent	False

	StepDown Date has occured

		Senior Certificate Beginning Balance = 0.00	False

		After StepDown Date and Senior Enh Percent >= Target Percent	False

		Stepdown Date has occurred	False

	Sixty-Plus Delinquency Percentage >= Target %

		3-Month Average Sixty-Plus Delinquency Percentage - Actual Value	0.45700000%

		Senior Enhancement Delinquency Percentage - Target Value	8.01979900%

		Sixty-Plus Delinquency Percentage >= Senior Enhancement Delinquency Percentage Target	False

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 18 of 19

Statement to Certificateholder

Residential Asset Securities Corp, 2006-KS4

June 26, 2006



Trigger Event clause (b) - Realized Loss Test

	Aggregate Realized Loss Percentage - Actual Value	0.00000000%

	Scheduled Loss Target Percent	999.99000000%

	Aggregate Realized Loss Percentage >= Scheduled Loss Percent	False

Trigger Event is in effect?

	Sixty-Plus Delinquency Percentage >= Senior Enhancement Delinquency Percentage Target	False

	Aggregate Realized Loss Percentage >= Scheduled Loss Percent	False

	Trigger Event is in effect	False

Stepdown Date and Trigger Event in effect

	Stepdown Date has occurred	False

	Trigger Event is in effect	False

	Trigger Event is in effect on or after StepDown Date	False



20. Comments

	ERISA Text:	Each beneficial owner of any Certificate (or any interest therein) which provides credit enhancement for any other Certificate and is available in book-entry form, including any such

		Class M Certificate, shall be deemed to have represented, by virtue of its acquisition or holding of such Certificate (or interest therein), that either: a) it is not an employee benefit
		or other plan subject to the prohibited transaction provision of the Employee Retirement Income Security Act of 1974, as amended('ERISA'), or Section 4975 of the Internal Revenue
		Code of 1986, as amended (a 'Plan'), or any other person (including an investment manager, a named fiduciary or a trustee of any Plan) acting, directly or indirectly, on behalf of
		purchasing any Certificate with 'plan assets' of any Plan; or b) (i) the transferee is an insurance company, (ii) the source of funds to be used by it to purchase the Certificates is an
		'insurance company general account' (within the meaning of Department of Labor Prohibited Transaction Class Exemption ('PTCE') 95-60), and (iii) the conditions set forth in
		Section I and III of PTCE 95-60 have been satisfied. Any purported beneficial owner of any such book-entry Certificate (or interest therein) to whom either (a) or (b) above does not
		apply shall indemnify and hold harmless the Company, the Trustee, the Master Servicer, any Subservicer, and the Trust Fund from and against any and all liabilities, claim, cost or
		expenses incurred by such parties as a result of its acquisition or holding of such Certificate.

06/27/2006

1:42:03PM

GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors

Page 19 of 19



	Statement To Certificateholder



	Residential Asset Securities Corp., 2006-KS4

	June 26, 2006



	Cash Flow Received and Uses of Funds


	Cash Flow Received		Amount

	Principal and Interest Payments		6,379,812.14
	Prepayment Premium		20,436.55
	Liquidation and Insurance Proceeds		0.00
	Subsequent Recoveries		0.00
	Repurchase Proceeds		76,429.39
	Other Deposits/Adjustments (including Derivatives Payment)		22,868.34
	Total Deposits		6,499,546.42

	Uses of Funds		Amount

	Transfer to Certificate Account		6,470,998.26
	Reimbursed Advances and Expenses		0.00
	Master Servicing Compensation		28,548.16
	Derivatives Payment		0.00
	Total Withdrawals		6,499,546.42

	Ending Balance		0.00



		GMAC-RFC, 2255 North Ontario Street, Suite 400, Burbank, CA 91504, 818.260.1400, www.gmacrfc.com/investors	Appendix A

RASC Series 2006-KS4 10-D