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. Stainless Steel Construction High Temperature Ceramic Coating Dyno tuned for maximum performance 3/8in. Thick Laser Cut Flanges Fits 1957 to 1974 Corvette, with a 327 or 350 cubic inch displacement V8 engine, shorty headers, Universal Center DumpProduct Description: 57-74 Corvette, Universal Center Dump, 327/350, V8, Shorty Headers, 1-5/8"" Primary, 16 Gauge Tubing, 3/8"" Flange, Silver Ceramic Coating, CARB EO D-698, 409S Stainless SteelPit Stop USA offers Flowmaster Headers - 1957-74 Corvette - Stainless Steel - SB 1-5/8 814120 at low everyday prices. Be sure to check out all our products from Flowmaster including Flowmaster Chevrolet Corvette Headers and Flowmaster SB Chevy Shorty Headers.