SPELAB Exhaust Header for 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 Ford F150 F250 Bronco 5.8L V8 Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. SPELAB offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed. Fitment: 1987-1995 Ford F-150 Pickup Truck(except 1993)1987-1995 Ford F-250 Pickup Truck1987-1995 Ford Bronco Pickup TruckFits 5.8L V8 OHV Models Only Features:Made of High-Quality T304 Stainless Steel MaterialInlet: 1.5 inch; Outlet: 1.25 inch; Oval: 2.75 inchTIG Welded CNC Machine FlangeInlet/ Outlet: 1.50" X 1.25" (Oval)/ 2.75"Comes with 1 set of 8-2-1 mandrel bent piping type with C.N.C machined flanges made exhaust header.Instruction is not included. Professional installation is highly recommended Specifications: Brand Name: SPELABCertificate: ISO9001:2000Application: Automobile Exhaust HeaderMaterial: Stainless SteelSurface: Mirror PolishModel:?EH28140 Exhaust Header VS Manifold, which is the better choice? The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold.