which headers work good with gt40p heads??

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which headers work good with gt40p heads??

Discussing which headers work good with gt40p heads?? in the 5.0 Mustangs Forum. any suggestions...

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March 19th, 2007, 11:16 PM	#1
5.0 Calypso Newbie Join Date: Mar 2007 Location: Palos Heights, Illinois Posts: 11	which headers work good with gt40p heads?? any suggestions

March 19th, 2007, 11:40 PM	#2
mikebert Enthusiast Join Date: Oct 2006 Location: Augusta, GA Posts: 906	MAC makes some GT40P specific headers; supposedly stockers will work. Also, most people report long tubes working fine. EDIT: Check this, it says FMS shorties also work http://www.corral.net/forums/showthread.php?t=610746

March 20th, 2007, 07:29 AM	#3
Darrell Feb 08 ROTM 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 7,287	Standard unequal length shorty headers won't work because of the GT40P spark plug location. MAC offers a coated GT40P-specific shorty and Ford Racing offers a set of stainless shorties that work. Stock Mustang headers work also. Most equal length shorties will not work. BBK equal length shorty headers have been known to fit. MAC, Hedman and BBK full length 1 5/8" headers fit. Some full length headers require minor clearancing on some primary tubes but is not a big issue. Spark plug wires with 90 degree boots are recommended with all headers. __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

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