[Compatible with Buick]: The funire disc brake caliper assembly is compatible with Buick 2005-2007 Allure, 2008-2008 Allure (V6 3.6L/V6 3.8L), 2009-2009 Allure (V6 3.8L), 2006-2007 LaCrosse, 2008-2008 LaCrosse (V6 3.6L/V6 3.8L), 2009-2009 LaCrosse (V6 3.8L) [Compatible with Pontiac & Chevrolet]: The funire disc brake caliper assembly is compatible with Pontiac 2004-2004 Grand Prix (with M10x1.0 port), 2005-2005 Grand Prix (V6 3.8L with M10x1.0 port), 2006-2008 Grand Prix V6 3.8L; Compatible with Chevrolet 2011-2013 Impala, 2014-2016 Impala Limited [Funire Replace OEM Part Number]: 18-B5010, 25990068, 88965581, 88965581, 88965579, 88965581, 18-B5011, 25990067, 88965582, 88965582, 88965580, 88965582. Position: Rear Driver and Rear Passenger [Specification]: Piston Diameter: 1.494 inches; Brake Piston Count: 1 Piston; Bleeder Port Size: M10x1.0; Inlet Port Size: M10x1.0; Installation Hardware Included: Yes,Sealing ring material : EPDM Brake Caliper Pair Set of 2 is coated with antirust coating, which can effectively prolong the service life. [Advantage]: The brake caliper is made of high-strength quality material, equipped with an advanced cooling system and excellent high-temperature resistance. It maintains stable braking performance even in environments ranging from -40° to 600°. The special coating enhances oxidation resistance and greatly extends its service life, safeguarding your driving safety. [Buy with Confidence]: The finely galvanized surface of the brake caliper delivers excellent rust resistance and environmental performance. It has passed a 150-hour salt spray test with no rust, ensuring the caliper stays clean and durable even in harsh environments. The product comes with a 5-Year Warranty for total peace of mind. Brake calipers are an important part of the vehicle's braking system and are responsible for slowing down the vehicle. When the brake caliper is stuck or damaged, it will cause the vehicle to move to one side and needs to be replaced regularly to ensure safety.