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Get the GREEN w/Cats Stainless Steel X-Pipe to connect your new Kooks Headers to. For LS1/LS6 5.7L.
The EPA approved Ultra High Performance "GREEN" Catalytic Convertors are a performance upgrade. Standard catalytic convertors are rated for up to 600 horsepower, whie the "GREENCats" are rated to 900 horsepower.
*These products are NOT legal for sale, installation, or use on a licensed vehicle in the state of California, and they do NOT meet CARB compliance