S&S Cycle 129" Big Bore Kit For Harley 107" Milwaukee Eight 2017-2025 - Non-Highlighted Fins Highlighted Fins

S&S Cycle 129" Big Bore Kit For Harley 107" Milwaukee Eight

Turn your 107 cubic inch Milwaukee Eight into a 129 cubic inch monster. S&S Cycle has done it again with their bolt-on big bore kit featuring a 4.32” bore and 11:1 compression ratio. This cylinder and piston kit will accommodate a high lift cam and keep your Harley-Davidson M8 happy on pump gas. No case mods, no engine removal; just a massive set of jugs, designed, tested, and manufactured here in the USA.

Features:

• Huge bore increase means huge power increase 
• Works with stock crankcases (no machine work) 
• Powder coat finish matches factory finish 
• MLS (multi-layered steel) head gaskets 
• 4.320" Bore 
• Retains stock engine height 
• Includes cubic inch cam cover badge 
• Made in USA