{"product_id":"wilwood-140-17658-d","title":"Wilwood Rear Drilled Rotor \u0026 Black Superlite Caliper Kit for G-Body Axles, 12.88-Inch, Internal Parking Shoes","description":"\u003cp\u003eConvert the documented GM G-Body Axle Flange rear brake arrangement with Wilwood Superlite 4R calipers and srp drilled \u0026amp; slotted rotors. This selection has black calipers, 4 pistons per service caliper and 12.88-inch rotor diameter, with fit determined by the installed hardware. From its base in Camarillo, California, Wilwood Engineering designs and manufactures disc-brake components and systems. Bill Wood founded the company in 1977. Motorsport, specialized applications and street-performance vehicles use its range of calipers, brake rotors, master cylinders, valves, fittings and brake lines, with component selection matched to the finished brake system.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 140-17658-D; supplied as an axle kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor hats:\u003c\/strong\u003e Aluminum parking brake hat - standard; Black E-Coat; hat offset 1.950 inches. Hat offset is distinct from axle offset.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing-flange requirement:\u003c\/strong\u003e G-Body flange; 2.62-inch axle offset, measured using the manufacturer worksheet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake rotor size:\u003c\/strong\u003e 12.88-inch outside diameter × 1.10-inch thickness; vented friction section.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachining prerequisite:\u003c\/strong\u003e Housing-flange material removal and two drilled holes required; follow the specific drawing and arrange qualified machine-shop work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor\/hat mounting-hole pattern:\u003c\/strong\u003e 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm; cataloged hole clearances 0.520 in; 13.21 mm. These are rotor or hat drillings, not replacement wheel studs. The retained hub or axle determines the vehicle wheel pattern.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService calipers:\u003c\/strong\u003e Forged Narrow Superlite 4R; 4 pistons per caliper; Black Powder Coat; radial mounting; stainless pistons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor specification:\u003c\/strong\u003e Material: Spec-37 Iron; Type: SRP Drilled Rotor; Style: SRP Drilled \u0026amp; Slotted; Surface Finish: Black Electro Coat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic lines:\u003c\/strong\u003e Hydraulic flexlines and fittings are not included; select compatible lines for the complete installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel envelope:\u003c\/strong\u003e 17-inch minimum nominal wheel diameter; verify the entire wheel-clearance drawing, including spoke and barrel shape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParking brake:\u003c\/strong\u003e Internal shoe parking brake supplied; cables, cable hardware and adapters are separate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplied friction pads:\u003c\/strong\u003e BP-10 compound; match operating conditions to the intended use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic sizing:\u003c\/strong\u003e cataloged bore sizes 1.12, 1.12 inches; piston area 1.98 square inches; inlet 1\/8-27 NPT.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware and retained components:\u003c\/strong\u003e Mounting hardware supplied; existing wheel hubs retained; spindles, master cylinder and brake booster are not included.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eDS1571 specifies a G-Body housing flange and 2.62-inch axle offset. This conversion requires substantial housing-flange modification, including material removal and drilling two holes; qualified machining should be arranged before disassembly. Check the axle register, stud clearance and complete 17-inch wheel envelope. The internal parking brake needs separately selected cables, cable hardware and adapters; no hydraulic hoses are supplied.\u003c\/p\u003e\u003cp\u003eSend PMB Performance the VIN and the relevant brake measurements for help with selection. We have over 20 years of experience working through parts and compatibility details.\u003c\/p\u003e\u003cp\u003eReview \u003ca href=\"https:\/\/www.wilwood.com\/PDF\/DataSheets\/ds1571.pdf\"\u003eInstallation instructions\u003c\/a\u003e, \u003ca href=\"https:\/\/www.wilwood.com\/Images\/BrakeKits\/Axle-Offset-Worksheet-Wilwood.pdf\"\u003eTechnical bulletin\u003c\/a\u003e for the complete installation and 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","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67757531857074,"sku":"140-17658-D","price":2299.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/140-17658-D_kit-xl.jpg?v=1792450516","url":"https:\/\/pmbperformance.com\/products\/wilwood-140-17658-d","provider":"PMB Performance","version":"1.0","type":"link"}