88" 3 5/8" Big Bore Cylinder and Piston Kit for 1984-'99 Big Twins with Stock Heads - Natural Aluminum Finish speaker Bagger Nation offers two kits

Bagger Nation offers two kits

similar to using a larger wrench to more easily turn a bolt

8mm 78 x 67

with Edge Chrome Tips

88" 3 5/8" Big Bore Cylinder and Piston Kit for 1984-'99 Big Twins with Stock Heads - Natural Aluminum Finish speaker Bagger Nation offers two kitsInstalling 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.