Flowmaster's Scavenger Series Elite shorty headers are designed to replace restrictive factory cast iron manifolds. These high quality headers are manufactured from 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 Flowmaster products, the benefits include improved throttle response, power and engine efficiency. Designed for an easy fit, these headers include gaskets and necessary hardware for easy installation. Note 1 - some Corvette applications may require additional alternator mounting brackets. Note 2 - fits applications without air injection only. Note 3 - this product has been granted a California Air Resources Board (CARB) exemption, an E.O. number, or is a direct or consolidated replacement part. It is 50-state legal, per the application guide. CARB EO# D-698.