88" 3 5/8" Big Bore Cylinder and Piston Kit for 1984-'99 Big Twins with Stock Heads - Natural Aluminum Finish speaker Designed for 4-3/8" stroke flywheels

Designed for 4-3/8" stroke flywheels

8mm 78 x 67

No settings or adjustments are needed

Fits 2009-2013 Touring

88" 3 5/8" Big Bore Cylinder and Piston Kit for 1984-'99 Big Twins with Stock Heads - Natural Aluminum Finish speaker Designed for 4-3/8" stroke flywheelsInstalling this 3 5 8" big bore kit will increase the displacement of stock 80" HD Evolution big twin engines to 88" using the stock 4 1 4" flywheels. The kit includes S&S 3 5 8" bore cylinders, 3 5 8" bore flat topped forged pistons with rings and wristpins, head gaskets, base gaskets, exhcaust gaskets, and instructions. The cylinders are shorter than stock, so shorter pushrods, and shorter manifold will be needed to complete the engine.