S&S, Evo 3-5/8 big bore piston set (OEM heads). +.030″

Used with 3-5/8 big bore cylinders in combination with 4-1/4″ (88″), 4-1/2″ (93″) or 4-3/4″ (98″) stroke with 5.375″ (88″), 5.500″ (93″) or 5.750″ (98″) long cylinders and stock heads. Kits include forged pistons, wrist pins, wrist pin clips and piston rings. Note: 98″ engines must use small 8-1/4″ ø flywheels. 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.