Flowmaster's Scavenger Series Elite shorty headers are designed to replace the restrictive factory 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 and factory collector connections, ensuring a direct-fit, leak free installation. 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: 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 1999 to 2004 Ford Mustang, GT with a 4.6L V8 engine, shorty headerProduct Description: Scavenger Series Elite Headers, Shorty, Stainless, Polished Ceramic Coated, Ford 4.6L Modular , (Set of 2)Pit Stop USA offers Flowmaster Headers - 1999-04 Mustang - Stainless Steel - 4.6L 1-5/8 814223 at low everyday prices. Be sure to check out all our products from Flowmaster including Flowmaster Ford 4.6L Modular V8 Shorty Headers and Flowmaster Ford Mustang (4th Gen) Headers.