KB576LCASTD M8 107" to 124" big bore conversion piston kit. STD

Take your 107-inch Milwaukee-Eight to the next level with this KB Performance big bore conversion kit. These forged 4032 alloy pistons are part of the Super Duty series, featuring hard-anodized crowns and top ring grooves to combat heat and prevent ring-to-groove micro-welding. A standout feature is the Line2Line abradable powder coating, which allows for a zero-tolerance installation; the pistons establish their own perfect 0.003-inch clearance during the run-in period for a superior ring seal. This kit is designed for 2017 to 2024 M8 107-inch engines using the stock 4.375-inch stroke and stock heads, though 4.25-inch bore cylinders are required. This setup results in a 124-inch displacement with an 11.4:1 compression ratio. These pistons are sold as a pair.