S&S, Evo 3-5/8 big bore piston set (OEM heads). Std. 84-99 Evo B.T. with 5.565" long 3-5/8" big bore cylinders and stock heads (

Used with or to built a 96" (4-5/8" stroke 5.565" cyl. length) engine with 3-5/8" big bore cylinders and stock cylinder heads. Compatible with stock length manifold. Approx. 10.1:1 CR. Kits include forged pistons wrist pins wrist pin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines. 84-99 Evo B.T. with 5.565" long 3-5/8" big bore cylinders and stock heads (NU)