Finding the correct pistons and gaskets to rebuild an overbored engine can be challenging, but you're in luck! These WSM Platinum Series Overbore Top End Piston Rebuild Kits are high-quality and feature construction that meets or exceeds OEM specifications. Every kit is made of high-grade materials to ensure it can withstand whatever your ride puts you through. Platinum series pistons feature specially formulated non-abrasive skirt coatings and hardened tops for added horsepower and longevity. These kits contain overbored pistons, ring sets, wrist pins, racing needle bearings, head & base gaskets, intake & exhaust gaskets, and improved E-clips. This kit is for cylinders that have already been overbored. WILL NOT WORK WITH STOCK BORE CYLINDERS/SLEEVES.