Cometic, EST top end gasket kit. Evo B.T. 3-5/8" big bore - 84-91 Evo Big Twin with 3-5/8" big bore cylinders (NU) Fork tube cap o-rings We are offering a direct

We are offering a direct fit

Reproduction side valve aluminum cylinder heads for 45" (750cc) WL models

With its outside diameter of 25

M8 x 20 threaded

Cometic, EST top end gasket kit. Evo B.T. 3-5/8" big bore - 84-91 Evo Big Twin with 3-5/8" big bore cylinders (NU) Fork tube cap o-rings We are offering a directWith 3. 625" bore MLS (Multi Layer Steel) . 040" thick head gaskets. The SLS (Single Layer Steel) cylinder base gaskets and SLS rocker cover gaskets used in these sets are . 020" thick and have . 001" of high temperature viton rubber coating on both sides. Kit comes with all gaskets, seals and o ring for a complete top end rebuild.