S&S, 107" to 124" big bore conversion cylinder & piston kit

Complete bolt-on 2025cc kit. Compatible with stock 107" engines, which have the required 4.375" stroke. Converts the 107" engine to 124". Incl. black wrinkle cylinders with highlighted fins and 4.250" bore forged piston & ring kit with 1.143” deck height and -4.3 cc dish volume for an 11:1 CR with stock cylinder head combustion chamber volume. Incl. all required head & base gaskets and hardware. Provides a massive increase in capacity with bolt-on installation ease, no case boring, head work or flywheel re-balancing required. Note: Compatible with OEM head bolts but S&S advises the, 14% stronger than stock, 576972 S&S head bolt kit for all big bore applications.

Fits: > 17-23 107" M8