{"product_id":"wilwood-120-13227","title":"Wilwood Right FSL4R Radial Brake Caliper, 1.88\/1.75-Inch Stainless Bores \/ 1.25-inch Rotor Width","description":"\u003cp\u003eWilwood’s right Forged Superlite 4R uses two pairs of stainless pistons in 1.88- and 1.75-inch bores. This is the radial-mount version for a nominal 1.25-inch rotor width, with internal fluid transfer and a Type III anodized surface. This component comes from Wilwood Engineering, established in 1977 by Bill Wood and based in Camarillo, California. Its disc brake design and manufacturing work includes calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized systems.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 120-13227. Component: Forged Superlite 4 Radial Mount caliper.\u003c\/li\u003e\n\u003cli\u003eSupply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.\u003c\/li\u003e\n\u003cli\u003ePiston dust boots: not fitted.\u003c\/li\u003e\n\u003cli\u003eNominal rotor width 1.25 inch; compatible outside diameter from 11.75 through 14.00 inches. Specified rotor-width limits: 1.15–1.35 inch.\u003c\/li\u003e\n\u003cli\u003eConstruction and surface: forged aluminum housing finished in Type III anodize.\u003c\/li\u003e\n\u003cli\u003eHydraulic inlet thread: 1\/8-27 NPT. Use a fitting with the correct thread and sealing seat.\u003c\/li\u003e\n\u003cli\u003eBracket interface: 5.98-inch radial centers with 0.39-inch holes. Specified mount height: 1.63 inches; orientation: right hand.\u003c\/li\u003e\n\u003cli\u003ePad fit is type 7420. Match the pad dimensions and compound to the rotor and intended braking conditions.\u003c\/li\u003e\n\u003cli\u003eCaliper weight: approximately 5.2 lb.\u003c\/li\u003e\n\u003cli\u003eBore configuration 1.88\/1.75 inches across 4 pistons; piston material: stainless steel. Hydraulic effective area: 5.18 square inches.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eCompare the 5.98-inch stud pattern and the caliper’s radial position against the bracket drawing. A rotor between 11.75 and 14.00 inches in diameter must also fall within the 1.15–1.35-inch width range, with the correct pad contact area.\u003c\/p\u003e\u003cp\u003eFor a replacement or custom installation, send PMB Performance the brake dimensions and existing component identification. Our 20+ years of experience can help narrow down the correct combination.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764017135794,"sku":"120-13227","price":302.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/120-13227-xl.jpg?v=1792508653","url":"https:\/\/pmbperformance.com\/products\/wilwood-120-13227","provider":"PMB Performance","version":"1.0","type":"link"}