{"product_id":"wilwood-120-17201-rd","title":"Wilwood Red XRS4R Four-Piston Brake Caliper, 1.12-Inch Bores and 1.10-Inch Rotor Width","description":"\u003cp\u003eThis red Wilwood XRS4R caliper uses four equal 1.12-inch stainless pistons in a forged aluminum housing. The X-shaped center bridge and internal fluid passages belong to an individual radial-mount brake component, selected here for a nominal 1.10-inch rotor width. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 120-17201-RD. Type: Forged XRS4R Radial Mount caliper.\u003c\/li\u003e\n\u003cli\u003ePiston arrangement: 4 stainless steel pistons; bore specification 1.12\/1.12 inches. Effective piston area: 1.98 square inches.\u003c\/li\u003e\n\u003cli\u003eRotor channel: 1.10-inch nominal width. Specified width limits: 1.00–1.10 inch; rotor outside diameter: 11.75–14.00 inches.\u003c\/li\u003e\n\u003cli\u003eMounting: radial, 5.98-inch centers; orientation: universal. 0.39-inch holes; 1.45-inch mounting height.\u003c\/li\u003e\n\u003cli\u003eHydraulic inlet thread: 1\/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.\u003c\/li\u003e\n\u003cli\u003eCaliper body: forged aluminum; finish: Red Powder Coat.\u003c\/li\u003e\n\u003cli\u003eBrake pad shape: 10416. Choose pad dimensions and friction material for the brake system.\u003c\/li\u003e\n\u003cli\u003eComponent: one individual hydraulic brake caliper. Select the mating rotor, pads, mounting hardware and line connection to suit the complete brake assembly.\u003c\/li\u003e\n\u003cli\u003ePiston dust boots: no.\u003c\/li\u003e\n\u003cli\u003eCaliper component weight: approximately 5.1 lb.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eA 5.98-inch mounting pattern does not identify the vehicle on its own. Check bracket offset and pad sweep on an 11.75–14.00-inch rotor, then confirm hydraulic balance against the rest of the system.\u003c\/p\u003e\u003cp\u003ePMB Performance has over 20 years of brake-component experience. Send the existing caliper identification, rotor measurements and mounting details for help comparing this configuration.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764558201010,"sku":"120-17201-RD","price":636.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/120-17201-RD-xl.jpg?v=1792514370","url":"https:\/\/pmbperformance.com\/products\/wilwood-120-17201-rd","provider":"PMB Performance","version":"1.0","type":"link"}