All new Quicksilver cast iron cylinder head, hardened valve seats press fit into thecylinder head with stainless steel valves featuring seats treated with acobalt-chromium alloy for extreme durability. This cylinder head is for applicationsusing roller rocker arms.2000-2015 MCM (sterndrive) 4.3L & 4.3L MPI4.3L 4V Crate Engines4.3L 4V Plus Series Engines2000-2015 4300 LU3 automotive, truck & industrial
*NEW* QUICKSILVER CYLINDER HEADS from Mercury RemanufacturingQuicksilver now offers a wide variety of new cast iron cylinder head assemblies built for maximum durability in extreme applications.All Quicksilver cylinder heads feature hardened seats on the intake and exhaust ports. Exclusive to Quicksilver are Black-X Composite valves that are stainless steel valves withseats treated with a cobalt-chromium alloy and black plasma nitriding. This composition provides extreme durability when using gasoline andcompatibility with alcohol and alternative fuels.
