Scavenger Series Elite Shorty Headers are designed to replace restrictive factory cast iron manifolds. These headers are manufactured from high quality stainless steel and are ceramic coated for maximum durability. They feature 1-5/8 in. primary tubes & 3/8 in. thick laser cut flanges. Like all Scavenger Series products, benefits include improved throttle response, horsepower & engine efficiency. Designed for an easy fit, these manifolds include gaskets and necessary hardware for easy installation. Note 1 - Some Corvette applications may require additional alternator mounting brackets. Note 2 - Fits non-air injected applications only. Note 3 - This product has been granted the California Air Resources Board (CARB) an EO exemption number, or is a direct or consolidated replacement part. It is 50-state legal, per the application guide.