106-0432 96" to 103" big bore pop-up piston kit. Std

This S&S big bore pop-up piston kit is a fantastic way to convert a 2007 to 2017 96-inch Twin Cam into a 103-inch powerhouse. The kit is designed to work with your stock 4-3/8 inch stroke, requiring only that the stock cylinders be bored to 3-7/8 inches. No crankcase boring or re-balancing is necessary. These forged pistons feature a 5cc pop-up dome that yields a 10.1:1 compression ratio with stock heads, providing a significant boost in torque. The kit is sold as a set and comes complete with rings, wrist pins, and clips. It is a straightforward, high-performance upgrade that is compatible with both stock and S&S cylinder heads.