Compatible with 04-10 Ford F150 5.4L V8 Shorty Header 1-5/8 in. Primary 16 Gauge Tubing 3/8 in. Flange Silver Ceramic Coating CARB EO D-698 409S Stainless Steel; 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. CARB EO# D-698.;