If it's time to rebuild your engine and restore lost performance, this Platinum Series Standard Bore Piston Kit is what you want! These WSM Platinum Series Standard Bore Piston 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 one piston, a ring set, a wrist pin, and improved E-clips. Whether you're looking for a more powerful ride, low-end torque, or even more top-end horsepower, these kits are what you need! This kit is for stock cylinders that have not already been overbored. WILL NOT WORK WITH OVERBORED CYLINDERS/SLEEVES.