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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 1-3/4" primaries, sold individually. It provides a durable OEM-replacement flange for high-temperature exhaust fittings. Made from T304 stainless and hand finished in the USA, this flange supports direct-fit 1-3/4" primary headers and carries Kooks' race-tested manufacturing pedigree and limited lifetime warranty to the original purchaser.
Kooks GM Gen5 LT-1 1 3/4in GM Gen5 LT-1
