{"product_id":"wilwood-120-17204-bk","title":"Wilwood Black XRS4R Brake Caliper, 0.89–0.99-Inch Rotor-Width Range, Four Stainless Pistons","description":"\u003cp\u003eA 0.95-inch nominal rotor specification separates this black Wilwood XRS4R from its 0.81- and 1.10-inch width relatives. The body is forged aluminum with four stainless pistons; its radial attachment permits bracket positioning to be checked independently of the hydraulic sizing. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California. It designs and manufactures disc braking systems for motorsport, street-performance and specialized applications, with a component range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 120-17204-BK. Type: Forged XRS4R Radial Mount caliper.\u003c\/li\u003e\n\u003cli\u003eCaliper body: forged aluminum; finish: Black Powder Coat.\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\u003ePiston arrangement: 4 stainless steel pistons; bore specification 1.38\/1.38 inches. Effective piston area: 3.00 square inches.\u003c\/li\u003e\n\u003cli\u003eBrake pad shape: 10416. Choose pad dimensions and friction material for the brake system.\u003c\/li\u003e\n\u003cli\u003eRotor channel: 0.95-inch nominal width. Specified width limits: 0.89–0.99 inch; rotor outside diameter: 11.75–14.00 inches.\u003c\/li\u003e\n\u003cli\u003ePiston dust boots: no.\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\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\u003eCaliper component weight: approximately 5.0 lb.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eDo not choose solely from the external appearance of an XRS caliper. Measure the rotor thickness, verify mounting height and establish the pad's position on the friction ring before comparing wheel clearance.\u003c\/p\u003e\u003cp\u003eWith 20+ years of experience, PMB Performance can help assess the brake hardware. Provide the caliper number, rotor dimensions and bracket measurements when asking about compatibility.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764580483250,"sku":"120-17204-BK","price":636.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/120-17204-BK-xl.jpg?v=1792514383","url":"https:\/\/pmbperformance.com\/products\/wilwood-120-17204-bk","provider":"PMB Performance","version":"1.0","type":"link"}