UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

Amendment No. 1 to the

x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2005,

or

¨ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from                      to                     

Commission File No. 001-15143

IMPCO Technologies, Inc.

(Exact name of registrant as specified in its charter)

Delaware	91-1039211
(State of Incorporation)	(IRS Employer I.D. No.)

16804 Gridley Place, Cerritos, CA	90703
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (562) 860-6666

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months, and (2) has been subject to such filing requirements for the past 90 days.

Yes x    No ¨

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act).

Yes x    No ¨

Number of shares outstanding of each of the issuer’s classes of common stock, as of August 3, 2005:

28,620,446 shares of common stock, $.001 par value per share.

Explanatory Note

This amendment to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2005 (the “Form 10-Q”) has been filed solely to amend and restate in their entirety Exhibits 31.1 and 31.2 to the Form 10-Q. No other changes have been made to the Form 10-Q or any other exhibit thereto.

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.

	IMPCO TECHNOLOGIES , INC.
Date: September 2, 2005	By:	/s/ Thomas M. Costales
		Thomas M. Costales Interim Chief Financial Officer and Treasurer [Authorized Signatory]