920-0140 Piston Kit Big Bore 4.250" for M8 Models

The S&S Big Bore piston kit is a critical component for riders performing engine upgrades on Milwaukee-Eight models. These 4.250-inch pistons are forged from aluminum and machined to precise tolerances to ensure dependable compression and a long service life. The kit is designed to support routine maintenance or significant performance builds, providing the durability needed for high-stress engine environments. S&S Cycle is renowned for engineering parts that maintain smooth operation and consistent power delivery. This kit includes the necessary components to refresh or expand the displacement of your engine. Sold individually.