Since 1962, Kooks has had the reputation of making the highest quality and best performing headers in the industry. Their Long Tube Headers for the C6 uphold that reputation. Dyno gains of over 30hp have been reported and the exhaust note is utter muscle car music to your ears. Manufactured from mandrel bent 304 stainless 1 3/4" or 1 7/8" primaries, with 3/8" D-port flanges, and 3" Venturi collectors this Kooks long tube header & off-road style mid section system could add up to 30 horsepower on any LS2/LS3 equipped corvette..Simply put, more air in requires more air out. Simpler still, Kooks stainless long tube headers and crossover system is the finest available for the C6 LS2/LS3. Headers pair Mid Section with cats or without Header gaskets Mounting hardware Installation instructions O2 sensor bungs as original NOTE: Proper engine tuning may be required to ensure that the headers are properly adapted to your car.