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Kooks C8 Super Street headers are designed to be used with an OEM catalytic converter or with Kooks’ Ultra-GREEN OEM connection pipes. The 304-grade stainless steel headers (part no. 21801400) are engineered for optimum fitment and increased acceleration performance.
The hand-crafted headers include 3/8"-thick flanges, 1-7/8" equal-length primaries for maximum horsepower and torque, Kooks’ patented scavenging spikes and one-piece collectors. The outlet size of the Super Street headers features 3/8"-thick three-bolt flanges to connect to the OEM catalytic converters, allowing for a direct bolt-on installation.
The Kooks’ Ultra-GREEN OEM connection pipes (part no. 21803300) are also made from 304-grade stainless steel with 3/8"-thick flanges. Installation hardware and all required gaskets are included.
When it comes to engine performance, the Kooks C8 Super Street headers and connection pipes have been dyno tested and displayed true performance improvements. After baselining a Z51-equipped test vehicle, the Kooks team bolted on a set of Super Street headers and Ultra-GREEN OEM connection pipes in place of the OEM manifolds and catalytic converters. The Kooks equipped C8 produced an increase of 20+ hp and 26+ ft-lbs. of torque on the stock tune with no check engine light. Dyno test results may vary.