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GM Header Flanges

Our American Made GM stainless header flanges are precision laser cut from .375 stainless to our exacting specifications. We carry over 250 different header flanges designs. Many of the popular models come in optional primary tube port sizes. They come pre-surfaced and ready for your header building project. If you don't see the flange your looking for, talk with one of our tech reps about custom header flange cutting.

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GM 4.3L V6 EcoTec3 LV3 Header Flange
GM 4.3L V6 Header Flange 1 5/8" Port
Our Price: $49.95

Precision laser cut from 3/8" thick 304 stainless, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the GM 4.3L V6 more info
GM 4.3L V6 EcoTec3 LV3 Header Flange
GM 4.3L V6 Header Flange 1 3/4" Port
Our Price: $49.95

Precision laser cut from 3/8" thick 304 stainless, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the GM 4.3L V6 more info
GM Chevy 2.3L Quad 4 Header Flange
GM 2.3L Quad 4 Stainless Header Flange
Our Price: $59.95

Precision laser cut from 3/8" thick 304 stainless, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the GM 2.3L Quad 4 engines. more info
GM 2.2 Liter Ecotec header flange
GM 2.2 Liter Ecotec Header Flange
Our Price: $59.95

Precision laser cut from 3/8" thick 304 stainless, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the 2.2L EcoTec engine. more info
Saab 9-7x Vortec 4200 Stainless Header Flange
Saab 9-7x Vortec 4200 Stainless Header Flange
Our Price: $69.95

Precision laser cut from 3/8" thick 304 stainless, our header flanges are manufactured in the U.S. and are machine surfaced. These header flanges are specifically made for the 4.2L Vortec I-6 found in a variety of 2005-2009 GM SUV's.
Port Size: 1.719"
more info
Chevy 4.2L Inline 6 DOHC Stainless Header Flange
Chevy 4.2L Inline 6 DOHC Stainless Header Flange
Our Price: $74.95

Precision laser cut from 3/8" thick 304 stainless, our header flanges are manufactured in the U.S. and are machine surfaced. This header flange fits a variation of GM 4.2L applications: Rainier, Trail Blazer, Colorado, Envoy, Hummer, Ascender and Saab 9-7X. more info