Raybestos FRC4178 R-Line Front Disc Non-Plated Brake Calipers are engineered to deliver safe, leak-free performance for everyday driving situations. Featuring OE-matched design and specifications, R-Line remanufactured calipers have had their seals, boots, bleeder screws and o-rings replaced to guarantee leak-free performance. EPDM70 rubber components are included for superior heat resistance, performance and durability and include pre-lubricated guide pins. These calipers are tested to the highest multinational industry standards to ensure you receive a high-quality product; testing includes checks for high and low-pressure leaks, extreme pressure strength and leaks, cyclic durability under extreme temperatures, piston retraction, fluid displacement and residual drag torque, rubber aging and degradation resistance.