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 bolt-on big-bore power package that increases displacement without case machining. 🔧🔥

• Forged pistons and a high-compression design improve combustion and throttle response.
• Oil pump and cam plate come with an anodized finish and removable passage plugs for easy servicing.
• Independent scavenge sections, debris screens and a cam-chest magnet protect oil flow and longevity.
• Adjustable pressure relief valve can be tuned with the unit installed; premium tappets and hardened tappet cuffs enhance valvetrain durability.
• All necessary gaskets, bearings and hardware for bolt-on installation are included.

Designed for high-performance street and custom builds, assembled in the USA. 🇺🇸