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The Kooks LT1 header flange for GM Gen5 LT1 engines is a 3/8" thick 304 stainless steel flange with oval ports sized for 1-7/8" primaries, sold individually. It serves as a robust replacement flange for aftermarket or custom header builds. Constructed from T304 stainless and finished in the USA, this flange matches Kooks' race-proven standards and fits 1-7/8" primary tubes while carrying the brand's limited lifetime warranty to the original purchaser.
Kooks GM Gen5 LT-1 1 7/8in GM Gen5 LT-1
