{"product_id":"wilwood-140-17655","title":"Wilwood Rear Brake Kit for Porsche 911 (1969–1983) – D31","description":"\u003cp\u003eRefresh both rear service brakes with forged aluminum D31 two-piston calipers, new 11.42-inch vented rotors, BP-10 pads and braided hoses.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore ordering: \u003c\/strong\u003eContact PMB so we can match the supplied D31 calipers to your 20 mm rear-rotor setup.\u003c\/p\u003e\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003ccaption\u003eVehicle fitment and required brake configuration\u003c\/caption\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePorsche model\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eYears\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eVersion \/ application\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eRequired brake setup\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e911\u003c\/td\u003e\n\u003ctd\u003e1969–1974\u003c\/td\u003e\n\u003ctd\u003eM-strut model (front-strut designation)\u003c\/td\u003e\n\u003ctd\u003e3.00-inch rear caliper mounts; 20 mm rear-rotor configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e911\u003c\/td\u003e\n\u003ctd\u003e1969–1974\u003c\/td\u003e\n\u003ctd\u003eS-strut model (front-strut designation)\u003c\/td\u003e\n\u003ctd\u003e3.00-inch rear caliper mounts; 20 mm rear-rotor configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e911\u003c\/td\u003e\n\u003ctd\u003e1975\u003c\/td\u003e\n\u003ctd\u003eCarrera\u003c\/td\u003e\n\u003ctd\u003e3.00-inch rear caliper mounts; 20 mm rear-rotor configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e911\u003c\/td\u003e\n\u003ctd\u003e1975–1977\u003c\/td\u003e\n\u003ctd\u003eS\u003c\/td\u003e\n\u003ctd\u003e3.00-inch rear caliper mounts; 20 mm rear-rotor configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e911\u003c\/td\u003e\n\u003ctd\u003e1978–1983\u003c\/td\u003e\n\u003ctd\u003eSC\u003c\/td\u003e\n\u003ctd\u003e3.00-inch rear caliper mounts; 20 mm rear-rotor configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e911\u003c\/td\u003e\n\u003ctd\u003e1983\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003ctd\u003e3.00-inch rear caliper mounts; 20 mm rear-rotor configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003cp\u003eMatch the brakes and suspension actually fitted to the car. Changed struts, hubs, uprights or previous brake conversions need a separate fitment check.\u003c\/p\u003e\u003cp\u003eM\/S in the table identifies the car’s factory front-strut version. Both rows still require 3.00-inch rear caliper mounts.\u003c\/p\u003e\u003ch2\u003eWhy choose this kit?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRefresh both rear service brakes with forged aluminum D31 calipers, new factory-size vented rotors, pads and hoses while keeping the original rear hub arrangement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-piston D31 calipers:\u003c\/strong\u003e forged aluminum bodies with stainless steel pistons and dust boots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBP-10 street-performance pads:\u003c\/strong\u003e a practical compound for everyday response and wear. Dedicated track use may require a different pad compound, fluid and cooling plan.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat is included?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e2 D31 calipers in the selected finish, 2 pistons per caliper.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 axle set of BP-10 brake pads\u003c\/strong\u003e, enough for both rear calipers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 vented rotors\u003c\/strong\u003e, 11.42 × 0.80 inches, in the selected surface pattern.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect-mount caliper fasteners\u003c\/strong\u003e for the original mounting bosses; separate adapter brackets are not required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 rear braided stainless steel flexline kit\u003c\/strong\u003e, part 220-17551, serving both wheels with the specified connection hardware.\u003c\/li\u003e\n\u003cli\u003eSpecified caliper mounting hardware, hose adapter fittings and crush washers.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eReused or purchased separately:\u003c\/strong\u003e Wheel hubs, struts\/uprights, master cylinder, brake booster, wheels and brake fluid are not included. Original parking-brake shoes, hardware and cables are retained and are not supplied as new parts.\u003c\/p\u003e\u003ch2\u003eWheel clearance and installation\u003c\/h2\u003e\u003cp\u003eWilwood lists a \u003cstrong\u003e15-inch nominal minimum wheel diameter\u003c\/strong\u003e. Diameter alone does not confirm fit: check the barrel and spoke profile against the wheel-clearance drawing and \u003cstrong\u003eFigure 2, page 3\u003c\/strong\u003e of the instructions. Maintain at least \u003cstrong\u003e0.080 inch (about 2mm)\u003c\/strong\u003e between the wheel and caliper in all areas.\u003c\/p\u003e\u003cp\u003eThe installer must check hose fittings, length and clearance through full suspension travel.\u003c\/p\u003e\u003ch2\u003eCommon questions\u003c\/h2\u003e\u003ch3\u003eDoes one kit cover the whole car?\u003c\/h3\u003e\u003cp\u003eNo. Quantity 1 covers both rear wheels. The opposite axle is a separate purchase; select it for your car’s actual brake configuration and evaluate the finished front-to-rear balance.\u003c\/p\u003e\u003ch3\u003eWhat happens to the parking brake?\u003c\/h3\u003e\u003cp\u003eThe original internal parking-brake arrangement is retained. Inspect and adjust its shoes, hardware and cable, and confirm the rotor drum interface during installation. Replacement parking-brake components are not included.\u003c\/p\u003e\u003ch3\u003eDo I need a different master cylinder?\u003c\/h3\u003e\u003cp\u003eWilwood’s instructions permit the stock master cylinder for the documented application. The installer must still confirm pedal travel, system condition and front-to-rear brake balance, especially on a modified car.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNeed help choosing?\u003c\/strong\u003e \u003ca href=\"https:\/\/pmbperformance.com\/pages\/contact-us\"\u003eAsk PMB to check your Porsche’s brake configuration\u003c\/a\u003e. Send the model\/year, VIN, wheel size and photos of the installed brakes, plus caliper mounting-center and rotor-thickness measurements.\u003c\/p\u003e\u003ch2\u003eInstallation Documents\u003c\/h2\u003e\u003cp\u003eInstallation instructions and clearance drawings open in a new tab.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.wilwood.com\/PDF\/DataSheets\/ds1580.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eInstallation instructions DS-1580 — use Figure 2 for this kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.wilwood.com\/Images\/BrakeKits\/WCD_Drawings\/WCD_dwg-Large\/ds1580a_wcd-lg.jpg\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eWheel-clearance drawing\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eInstallation must be performed by a person experienced in disc-brake systems. Follow the complete instructions for bleeding, bedding, testing and inspection before road use.\u003c\/p\u003e\u003ch2\u003eWatch: Wilwood Disc Brakes overview\u003c\/h2\u003e\u003cp\u003eSee how Wilwood designs and manufactures its brake components.\u003c\/p\u003e\u003cdiv style=\"width:100%;aspect-ratio:16\/9\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/oEdAhm4Ikpg?rel=0\u0026amp;playsinline=1\" title=\"Wilwood Disc Brakes overview\" width=\"560\" height=\"315\" style=\"width:100%;height:100%;border:0\" loading=\"lazy\" referrerpolicy=\"strict-origin-when-cross-origin\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\u003cp\u003e\u003cstrong\u003eManufacturer warning — brake pads only:\u003c\/strong\u003e WARNING: Cancer and Reproductive Harm. \u003ca href=\"https:\/\/www.P65Warnings.ca.gov\" target=\"_blank\" rel=\"noopener\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Black \/ Plain","offer_id":67757531398322,"sku":"140-17655","price":1000.39,"currency_code":"USD","in_stock":true},{"title":"Black \/ Drilled \u0026 Slotted","offer_id":67767179804850,"sku":"140-17655-D","price":1142.7,"currency_code":"USD","in_stock":true},{"title":"Red \/ Drilled \u0026 Slotted","offer_id":67767179837618,"sku":"140-17655-DR","price":1142.7,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ Plain","offer_id":67767179870386,"sku":"140-17655-Y","price":1000.39,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ Drilled \u0026 Slotted","offer_id":67767179903154,"sku":"140-17655-DY","price":1142.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/140-17655_kit-xl.jpg?v=1792450502","url":"https:\/\/pmbperformance.com\/products\/wilwood-140-17655","provider":"PMB Performance","version":"1.0","type":"link"}