{"product_id":"wilwood-130-4956","title":"Wilwood GM Round Caliper O-Ring Four-Pack, 2.380-Inch ID and 0.139-Inch Thickness","description":"\u003cp\u003eThe GM round-ring kit contains four piston O-rings at the listed 2.380-inch inside diameter. A 0.139-inch section distinguishes the round seal from the square-profile kit carrying a similar size label. The manufacturer identifies the compound as 210A without specifying a broader universal caliper application. Based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. The manufacturer produces disc brake systems and components for motorsport, street-performance and specialized applications, with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Individual components are chosen to suit the complete brake system.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 130-4956\u003c\/li\u003e\n\u003cli\u003eService component: Caliper O-Ring Kit\u003c\/li\u003e\n\u003cli\u003eSeal profile: O-Ring\u003c\/li\u003e\n\u003cli\u003eManufacturer-listed seal inside diameters: 2.380 inches\u003c\/li\u003e\n\u003cli\u003eListed seal thickness: 0.139 inch\u003c\/li\u003e\n\u003cli\u003eManufacturer material code: 210A\u003c\/li\u003e\n\u003cli\u003ePack quantity: 4 Pack\u003c\/li\u003e\n\u003cli\u003eSeal fluid compatibility: DOT 3, DOT 4 and DOT 5 as specified for these seals. Follow the complete caliper and vehicle fluid requirements; do not mix silicone DOT 5 with DOT 3, DOT 4 or DOT 5.1.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eCheck the caliper’s assigned service kit and the actual groove shape before replacement. Match cross-section and ID together, and do not substitute a square seal using size alone. Inspect the hydraulic piston and bore and assess the rest of the caliper’s rubber parts and hardware separately.\u003c\/p\u003e\u003cp\u003eWith over 20 years of parts experience, PMB Performance can help compare this component with your existing brake assembly. Include its caliper reference and any conversion-kit information.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764693598386,"sku":"130-4956","price":18.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/130-4956-xl.jpg?v=1792514683","url":"https:\/\/pmbperformance.com\/products\/wilwood-130-4956","provider":"PMB Performance","version":"1.0","type":"link"}