Here are two brand new complete Standard Bore teflon coated piston kits for the Ski Doo models below.  This kit is OE quality and comes with pistons, rings, circlips, and pins.  These pistons are made by SPI and feature silicone aluminum alloy construction with teflon and molybdenum coating and a hard anodized crown.  They will work in both cast or chrome cylinders. 

Standard bore size for these sleds is 72mm.