Finding the correct piston rings for an overbored engine can be challenging, but you're in luck! This WSM Overbore Piston Ring Set is high-quality and built to meet or exceed OEM specifications. Every set is made of high-grade materials to ensure it can withstand whatever your ride puts you through. These kits are for WSM Overbore Pistons Only. This set is for cylinders that have already been overbored. WILL NOT WORK WITH STOCK BORE CYLINDERS/SLEEVES.