106-5511 3-1/2" bore 8:1CR piston kit. Std

This S&S piston kit is the definitive choice for overhauling a 1979 to 1984 1340cc Shovelhead. These standard-bore pistons are forged from an advanced alloy with specialized skirt profiles, offering the quiet operation of a cast piston with the superior strength of a forging. Designed for a stock 8:1 compression ratio and a 4-1/4 inch stroke, they are an excellent replacement for tired factory slugs. Sold as a set, they provide the durability needed for modern fuels and long-distance touring. As with any high-performance piston, a knowledgeable mechanic should verify all clearances during installation to ensure a perfect break-in and a long engine life.