{"product_id":"wilwood-140-14978","title":"Wilwood Front AERO6R\/ST Road-Race Brake Kit for BMW E46 M3 (2001–2006), Thermlock Calipers and Dynamic 14-Inch GT Rotors","description":"\u003cp\u003eThis E46 M3 front race conversion uses six-piston AERO6R\/ST calipers, dynamic 14-inch GT rotors and BP-35 pads. Thermlock pistons serve the high-temperature caliper arrangement, while the kit retains the specified BMW hubs and supplies its front flexlines. Founded by Bill Wood in 1977, Camarillo, California-based Wilwood Engineering designs and manufactures disc brake systems plus their individual components. Its work serves specialized applications, motorsport and street-performance vehicles, with a range of calipers, brake rotors, master cylinders, valves, fittings and brake lines. A compatible complete system governs the selection of each part.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number\u003c\/strong\u003e — 140-14978.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor construction and friction surface\u003c\/strong\u003e — Spec-37 Iron; Vented; GT Slotted; surface finish: Plain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliper color, finish and hydraulic inlet\u003c\/strong\u003e — Anodize; Type III Anodize; inlet 1\/8-27 NPT.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel bolt circle\u003c\/strong\u003e — 5 X 4.72 in; 5 X 119.89 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal minimum wheel diameter\u003c\/strong\u003e — 18 in; 457.2 mm; verify full spoke and barrel clearance using the kit drawing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical package contents\u003c\/strong\u003e — no separate hubs included; mounting hardware included: Yes; spindles included: No.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexline specification\u003c\/strong\u003e — Line kit included (manufacturer): 220-11983 (18.00 in); Front line-kit reference: 220-11983.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake function and supply\u003c\/strong\u003e — Front road-race brake kit; Disc braking; front axle; Sold as a kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService caliper assembly\u003c\/strong\u003e — AERO6; 6 pistons in each caliper; Thermlock pistons; Forged Aluminium body; Radial mounting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplied pad compound\u003c\/strong\u003e — BP-35.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHat wheel-stud clearance diameter\u003c\/strong\u003e — 0.610 in; 15.49 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor mounting hat\u003c\/strong\u003e — aluminum; Black E-Coat; hat offset 0.850 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic package contents\u003c\/strong\u003e — brake lines included: Yes; master cylinder included: No; booster included: No.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRace pad operating range\u003c\/strong\u003e — BP-35 pads are intended for high-temperature racing; extended low-temperature operation causes premature pad and rotor wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor dimensions\u003c\/strong\u003e — outside diameter 14.00 in; 355.6 mm; thickness 1.25 in; 31.75 mm.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eUse the documented 2001–2006 BMW E46 M3 application and verify the retained hub interface. DS1275 requires cutting the front dust shield and adapting the line-retention details shown in the guide. Check the complete 18-inch wheel envelope; the race pads are unsuitable for extended low-temperature operation.\u003c\/p\u003e\u003cp\u003eListed model families are M3; the individual year and brake\/spindle conditions remain decisive. Use the fitment table below to confirm year, model, trim and brake or suspension options.\u003c\/p\u003e\u003cp\u003ePMB Performance brings over 20 years of parts and fitment experience. Send the vehicle details and installed brake\/suspension configuration if you need help checking this package.\u003c\/p\u003e\u003cp\u003eCheck the \u003ca href=\"https:\/\/www.wilwood.com\/PDF\/DataSheets\/ds1275.pdf\"\u003eInstallation instructions\u003c\/a\u003e for the full assembly and wheel-clearance requirements.\u003c\/p\u003e\u003ch3\u003eManufacturer Warning\u003c\/h3\u003e\u003cp\u003eApplicable to brake pads only. 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 www.p65warnings.ca.gov.\u003c\/p\u003e\u003cdiv class=\"fitment-table-wrap\" style=\"overflow-x:auto\"\u003e\u003ctable class=\"specs\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eModel option\u003c\/th\u003e\n\u003cth\u003eFront brakes\u003c\/th\u003e\n\u003cth\u003eRear brakes\u003c\/th\u003e\n\u003cth\u003eKit application\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e2001-2006\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003eFront Kit\u003c\/td\u003e\n\u003ctd\u003e1, 2, 3, 4\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67757019365554,"sku":"140-14978","price":3293.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/140-14978_kit-xl.jpg?v=1792443144","url":"https:\/\/pmbperformance.com\/products\/wilwood-140-14978","provider":"PMB Performance","version":"1.0","type":"link"}