Easily upgrades your 2.1L Waterboxer to 2.2L Increases displacement from 2054cc to 2120cc Complete kit includes pistons, cylinders, pins, clips, and rings Transform your 2.1L Waterboxer engine (DP, MV, SR, SS codes) with the Big-Bore Barrel and Piston Kit. This kit offers a straightforward solution to boost torque and horsepower without the need for extensive modifications. By simply installing 95.5mm pistons, you can enhance your engine's performance while maintaining reliability. This comprehensive kit includes everything you need for a successful upgrade: four pistons, four cylinders, four pins, clips, and a full set of rings.