{"product_id":"wilwood-140-12272","title":"Wilwood Front Challenge Series Brake Kit for Magnum Force Drop Spindles, Black Superlite Calipers and 12.88-Inch GT Rotors","description":"\u003cp\u003eThis Wilwood front Challenge Series kit is configured for the specified Magnum Force drop spindle. Black six-piston Superlite calipers clamp GT slotted 12.88-inch one-piece rotors, with replacement hubs and BP-10 pads supplied. The aftermarket spindle identifies the mounting application; no general donor-vehicle fitment is established by the kit name. 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. Its product range serves motorsport, street-performance, and specialized applications, with individual components selected to match the requirements of the complete brake system.\u003c\/p\u003e\u003ch2\u003eTechnical Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 140-12272\u003c\/li\u003e\n\u003cli\u003eType: Forged Narrow Superlite 6R Big Brake Front Brake Kit (Hub and 1PC Rotor)\u003c\/li\u003e\n\u003cli\u003eCalipers: Forged Narrow Superlite 6R; 6 pistons per caliper; Black Powder Coat; radial mounting.\u003c\/li\u003e\n\u003cli\u003ePiston bores: 1.62, 1.12, 1.12 inches; Stainless pistons. Included pad compound: BP-10.\u003c\/li\u003e\n\u003cli\u003eRotors: 12.88-inch diameter × 1.10-inch width; GT Slotted; Iron; Black Electro Coat finish.\u003c\/li\u003e\n\u003cli\u003eReplacement hubs: Hub - Hat Mount; Aluminum; Bare. Bearings and hub hardware are specified in the installation instructions.\u003c\/li\u003e\n\u003cli\u003eWheel bolt circles: 5 x 4.50; 5 x 4.75 inches.\u003c\/li\u003e\n\u003cli\u003eIncluded: paired calipers, pads, rotors, brackets and assembly hardware, replacement hubs and bearings.\u003c\/li\u003e\n\u003cli\u003eHydraulic flex lines are separate. Master cylinder, booster and spindles are not included; retain or select suitable matching components.\u003c\/li\u003e\n\u003cli\u003eConditional minimum wheel diameter: 17 inches. Verify the complete clearance drawing for barrel and spoke offset before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eCompare the installed Magnum Force upright directly to DS866 before ordering. Its hub and bracket geometry must match the kit, and the new wheel bolt circle must suit the chosen wheels. Inspect spindle journals and bearing fit during assembly rather than reusing unsuitable components. Choose compatible hydraulic flex lines separately and route them clear at full steering lock. The conditional wheel minimum is 17 inches, subject to the entire caliper section and available spoke depth.\u003c\/p\u003e\u003cp\u003eWilwood installation documents: \u003ca href=\"https:\/\/www.wilwood.com\/PDF\/DataSheets\/ds866.pdf\"\u003eInstallation instructions\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003ePMB Performance has over 20 years of brake-system experience. Contact us with your vehicle, axle or spindle details and wheel measurements for fitment help.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCalifornia Proposition 65 warning, brake pads only:\u003c\/strong\u003e WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to \u003ca href=\"https:\/\/www.p65warnings.ca.gov\/\"\u003ewww.p65warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67765569159346,"sku":"140-12272","price":1660.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/140-12272_kit-xl.jpg?v=1792520823","url":"https:\/\/pmbperformance.com\/products\/wilwood-140-12272","provider":"PMB Performance","version":"1.0","type":"link"}