Athena has developed a wide range of forged pistons specifically for use in the off-road / ATV market and manufactured using a revolutionary computerized technology originating from GP & F1 racing. Athena forged pistons offer the best solution in terms of performance and reliability thanks to redesigned squish areas, modified compression characteristics and advanced surface treatments, which improve their fluidity. Replacement standard piston for the Athena Big Bore Kit. Specially designed, high-performance Cast-Lite, flat top piston. Piston is sold complete with rings, wrist pins and circlips. Note: Piston and directly related parts ONLY; all other parts sold separately. Note: All Athena products, which are manufactured with higher displacement and power than those permitted by law of the country where the end user lives, are intended solely for competition-sports usage.