16773-96-K Cylinder head & base gasket kit. 4.00" bore

This James Gaskets kit is designed to service one engine, specifically 1984 to 2017 Evolution style motors with a 4-inch bore, such as those from S&S or TP Engineering, excluding Twin Cooled versions. The set is sold as a pair and includes high-quality Firering head gaskets with a silicone bead, featuring a final crush thickness of .042 inches. For the bottom of the cylinders, the kit provides .022-inch Rubber Coated Metal base gaskets that crush down to .020 inches. These RCM gaskets are built with a stainless spring steel core and a Viton rubber coating, ensuring a permanent seal that does not require re-torquing. It is a professional-grade solution for maintaining compression and preventing leaks in high-displacement Evo-style engines.