17033-92-4 Top end gasket kit. Evo B.T. 4" big bore

For riders running 4-inch big bore cylinders on 1992 to 1999 Evolution style engines, this James Gaskets top-end kit is the professional's choice. Sold as a kit, it features .045-inch head gaskets equipped with Firering technology for a high-pressure seal. The kit also includes Rubber Coated Metal cylinder base and rocker base gaskets, which provide excellent durability and heat resistance without the need for re-torquing. To finish the top end, you get rubber rocker cover gaskets and all the required seals and o-rings. This kit is specifically tailored for the larger bore size, ensuring every component fits perfectly to prevent leaks and maintain peak performance on your modified Evo Big Twin.