S&S CYCLE 136" Big Bore Kit — 136 in, 4.320 in bore, 4.625 in stroke – 18-23 Softail, 21, 23 Touring, 17-23 Trike, 20-22 CVO

Build 136" displacement with this S&S Cycle big bore kit, designed around 4.320" cylinders and the S&S 4-5/8" (4.625") stroker flywheel sold separately.

It maintains original factory engine height to help preserve stock frame and exhaust clearance, and it retains the original engine serial numbers.

Included in the kit:

• 2 cylinders with ductile iron liners
• 2 forged piston kits
• 2 multi-layer steel (MLS) head gaskets
• 2 base gaskets and cylinder O-rings
• 1 S&S Cycle 136" cam cover badge

Compatible with 114" and 117" engines with stock flywheel for 132" high-compression displacement; 136" displacement requires the S&S 4.625" stroker flywheel. 107" engines also require the S&S 4.625" stroker flywheel assembly to achieve 136" displacement. Does not fit models equipped with Variable Valve Timing (VVT), and it is not compatible with H-D 4-5/8" stroke flywheel.