UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 25, 2005

AMERIQUEST MORTGAGE SECURITIES INC.

(as depositor under the Pooling and Servicing Agreement,

dated as of April 1, 2005, providing for the issuance of

Asset-Backed Pass-Through Certificates, Series 2005-R4)

Ameriquest Mortgage Securities Inc.

(Exact name of registrant as specified in its charter)

Delaware	333-121781	33-0885129
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification Number)

1100 Town & Country Road, Suite 1100 Orange, California	92868
(Address of Principal Executive Offices)	(Zip Code)

Registrant’s telephone number, including area code: 714-564-0660

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12(b))

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Section 9 - Financial Statements and Exhibits

Item 9.01.

Financial Statements and Exhibits

(a)	Financial Statements.
	Not applicable.
(b)	Pro Forma Financial Information.
	Not applicable.
(c)	Exhibits.

Exhibit No.	Item 601(a) of Regulation S-K Exhibit No.	Description
1	5.1, 8.1, 23.1	Opinion and Consent of Thacher Proffitt & Wood LLP.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Dated: May 25, 2005

AMERIQUEST MORTGAGE SECURITIES INC

By:

/s/ John P. Grazer

Name:

John P. Grazer

Title:

CFO

EXHIBIT INDEX

Exhibit Number	Item 601(a) of Regulation S-K Exhibit No.	Description
1	5.1, 8.1, 23.1	Opinion and Consent of Counsel

AMERIQUEST MORTGAGE SECURITIES INC 8-K