Head Gasket Set with Head Bolts Kit For 1999-2003 Ford Windstar 3.8L V6 VIN Code 4 Multi-layered Steel by Detoti Auto Parts Intake Manifold Gasket Is responsible for sealing the intake manifold against the Cylinder head. Exhaust Manifold Gasket Will prevent symptoms such as an excessive Noisy Engine; Decreased power; acceleration and Fuel Efficiency. The Valve Cover Is a metal cover that is found on the very top of the engine. It is attached to the engine by a gasket made of rubber or cork. A valve cover and gasket will seal the top of the engine while preventing oil leaks. The covers are removable so the mechanic can access the valves for adjustment. 16 Head BoltsComes with 16 Head Bolts Choosing whether to use head bolts or head studs in an automobile engine can be an important decision that affects the way a car runs. For one, bolts are usually partially or fully threaded, while studs are typically threaded on both ends and often have an unthreaded middle section of the shaft. Detoti Auto gives a 100% SATISFACTION GUARANTEED; Established in 1993; We are the Only Licensed Sellers of Detoti Auto Parts; Please Do Not Except Any Imitations!