Quick Overview Raybestos Caliper Piston is designed to maximize performance and increase durability This self-adjusting caliper piston features a corrosion resistant high-temperature synthetic lubricant and improves trouble-free operation It improves braking and ensures safe, leak-free performance Designed to maximize performance and increase durability Raybestos Caliper Piston is designed to maximize performance and increase durability. This self-adjusting caliper piston features a corrosion resistant high-temperature synthetic lubricant and improves trouble-free operation. It improves braking and ensures safe, leak-free performance.