ACDelco 172-2442 GM Original Equipment Rear Disc Brake Caliper Piston Seal Kit with Boots and Seals GM-recommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function GM-recommended replacement part for your GM vehicle's original factory component Offering the quality, reliability, and durability of GM OE Manufactured with GM Original Equipment specification for fit, form, and function