Description & Size Guide
3-5/8" big bore. Kit to service one engine. With .045" firering head (.042" final crush) & .020" RCM (Rubber Coated Metal) base gaskets. The use of o-rings is not required due to head gasket design. RCM explained: RCM (Rubber Coated Metal) consists of a .020" thick stainless spring steel base covered with a .001" thick heat resistant Viton rubber on both sides. A very strong gasket which requires no re-torquing.
84-99 Evo B.T.; 86-22 Evo XL (excl. XR1200). With 3 5/8" big bore cylinders (NU)
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