S&S CYCLE 129" Power Package for M8 — 4.32" bore, 4-3/8" stroke, Highlighted Fins – 18-23 Softail, 17-19, 21-23 Touring, 22 CVO, 17-23 Trike

Upgrade your M8 with a big-bore, bolt-on power package that increases displacement without case machining. 🔧

Forged pistons and oversized cylinders are paired with S&S 550 cams to deliver reliable, high-performance operation for demanding rides. ⚙️

The S&S oil pump and cam plate feature a blue anodized finish and include removable passage plugs for easy servicing.

Independent scavenge sections, debris screens on pickups, and a magnet in the cam chest help protect the oiling system while increasing flow capacity.

An adjustable pressure relief valve can be tuned with the unit installed, and the kit includes premium tappets, Quickee pushrods, and hard-anodized billet tappet cuffs.

All necessary gaskets, bearings, and hardware for a bolt-on installation are included, and the kit is made in the USA. 🇺🇸