{"product_id":"wilwood-120-7741","title":"Wilwood Left Rear Chrome GP310 Caliper for Harley-Davidson Dyna Bottom-Bracket Installation","description":"\u003cp\u003eThe chrome left-rear GP310 is the caliper identified by Wilwood for its Dyna bottom-bracket arrangement. It uses four 1.25-inch stainless pistons and a 3.50-inch mounting pattern. The left-hand body should be paired with the specified rear bracket rather than assigned the broader fitment of every GP310 rear installation. Based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. The manufacturer produces disc brake systems and components for motorsport, street-performance and specialized applications, with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Individual components are chosen to suit the complete brake system.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number: 120-7741\u003c\/li\u003e\n\u003cli\u003eCaliper type: GP310 Motorcycle Rear\u003c\/li\u003e\n\u003cli\u003eConstruction: Billet Aluminium\u003c\/li\u003e\n\u003cli\u003eFinish: Chrome\u003c\/li\u003e\n\u003cli\u003ePiston bores: 1.25 \/ 1.25 inches\u003c\/li\u003e\n\u003cli\u003ePiston type: Stainless\u003c\/li\u003e\n\u003cli\u003ePiston count: 4\u003c\/li\u003e\n\u003cli\u003ePublished piston area: 2.46 square inches\u003c\/li\u003e\n\u003cli\u003eDust boots: No\u003c\/li\u003e\n\u003cli\u003eNominal rotor width: 0.25 inch\u003c\/li\u003e\n\u003cli\u003eRotor thickness limits: 0.18–0.25 inches\u003c\/li\u003e\n\u003cli\u003eRotor diameter limits: 9.00–11.50 inches\u003c\/li\u003e\n\u003cli\u003eMounting style: Lug\u003c\/li\u003e\n\u003cli\u003eMounting side: Left Hand\u003c\/li\u003e\n\u003cli\u003eMounting centers: 3.50 inches\u003c\/li\u003e\n\u003cli\u003eMounting-hole size: 0.39 inch\u003c\/li\u003e\n\u003cli\u003eMount height: 1.55 inch\u003c\/li\u003e\n\u003cli\u003eHydraulic inlet thread: 3\/8-24\u003c\/li\u003e\n\u003cli\u003eRequired pad shape: 6208\u003c\/li\u003e\n\u003cli\u003ePublished pad area: 3.65 square inches\u003c\/li\u003e\n\u003cli\u003ePublished pad volume: 0.63 cubic inches\u003c\/li\u003e\n\u003cli\u003eManufacturer-listed component weight: 2.1 lb\u003c\/li\u003e\n\u003cli\u003eSupplied brake components: Individual GP310 caliper with brake pads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eFL186 identifies the left-hand rear caliper for the Dyna bottom bracket and lists the separate 1984–1999 bracket application. Confirm the actual bracket reference on the motorcycle, rotor offset and pad track. The caliper is supplied without that bracket; check line routing and clearance at the lower rotor position before assembly.\u003c\/p\u003e\u003cp\u003eWith over 20 years of parts experience, PMB Performance can help compare this component with your existing brake assembly. Include its caliper reference and any conversion-kit information.\u003c\/p\u003e\u003cp\u003eBrake-pad warning: Cancer and Reproductive Harm. \u003ca href=\"https:\/\/www.P65Warnings.ca.gov\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e. This warning applies to the brake pads.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67764664598706,"sku":"120-7741","price":562.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/120-7741-P-xl.jpg?v=1792514578","url":"https:\/\/pmbperformance.com\/products\/wilwood-120-7741","provider":"PMB Performance","version":"1.0","type":"link"}