The Vertex Piston Kit C is designed as a high-quality OEM replacement, offering both cast and forged options for two-stroke and four-stroke engines. Two-stroke piston kits are made from gravity-cast aluminum alloy with 18% silicone content, ensuring a lightweight yet durable construction. Four-stroke pistons are forged from 2618 aluminum for added strength and longevity. High-compression four-stroke pistons enhance power and torque across the RPM range, while big-bore pistons increase engine displacement, torque, and peak horsepower. All pistons undergo a T-5 hardening and tempering process for durability. The piston skirts feature a Molybdenum Disulphide coating, which improves break-in time and extends piston life. The kit includes a piston, rings, wrist pin, and circlips. Two-stroke replacement rings are sold individually, while four-stroke rings are sold as a complete set.