Ceramic Metallic Coated Headers - ARMOR*COAT CERAMIC-METALLIC COATED HEADER KIT For 4- and 6-cylinder trucks, vans and off-road vehicles Resists rust and corrosion to extend header's life Increases horsepower?and looks great! Computer designed for easiest installation and best fit A "must" for 4- and 6-cylinder engines equipped with a power-robbing restrictive exhaust manifold. Helps engine "breathe" better to improve performance and fuel economy and to provide the acceleration you need when you need it. Made of 18-gauge mandrel-bent mild steel tubing with thick flanges and surface-ground O-ring exhaust ports. Polished Armor*Coat finish enhances header's appearance; won't discolor like header paint, chrome or conventional coatings; reduces under-hood temperatures for greater engine efficiency and cleans easily. Armor*Coat?a space-age metallic-ceramic coating?is applied to each header. It forms a near metal-to-metal bond after high-temperature curing. Lasts longer than almost any other coating and is super resistant to chipping and peeling. Header, hardware, gaskets and illustrated instructions included. Header bolts not included. TD=Tubing Diameter; CD=Collector Diameter. Note: Will not fit turbocharged vehicles. Shipped separately from factory. Cannot be shipped express. Check local emission laws before ordering. NOTE: SKU numbers ending in F are factory shipped and may take a little longer to reach you. (A) Flanged collector. (B) Slip-fit collector. (C) With hookups for smog and engine-management sensors. (D) Without smog or engine-management hookups. (E) Includes collector reducer?fabrication required to hook up to exhaust system. (F) Includes header extension to connect to stock system?fabrication may be required. (G) Fits cylinder heads with evenly spaced exhaust ports. (H) Fits cylinder heads with pair exhaust ports. Applications: Toyota Supra 3.0L/7MGE; 1-1/2" x 2"