The Big Bore 106 "Piston set of brands is a high -quality choice for motorcycle enthusiasts who want to improve their Harley Davidson in terms of performance. This piston set includes forged pistons that have been specially designed for increased durability and performance. The pistons are provided with a low -friction coating that is minimized and the efficiency is increasing. Molybdenum piston rings, which are known for their durability and resistance to high temperatures and pressures.