S&S CYCLE Engine Performance Kit — 4.320" Bore, 129" Displacement, 11.0:1 Compression – 18-26 Softail, 24-26 Touring, 17-26 Trike, 25 CVO

Built for M8 models, including VVT applications, this S&S Cycle performance kit is a bolt-on big bore solution that increases a 107" M8 to 129" without case machining.

It combines an S&S oil pump/cam plate, 496 camshaft, Quickee pushrods with pushrod tubes, premium tappets, and MLS head gaskets for a complete engine package.

Designed with independent scavenge sections, debris screens in both pickups, a cam chest magnet, and an adjustable pressure relief valve, it helps support strong oil control and easy servicing.

It retains stock engine height, works with stock crankcases, and is compatible with stock and S&S roller rocker arms. Original engine serial numbers are retained.

Made in the USA.