{"product_id":"wilwood-gp310-front-brake-caliper-4-piston-billet-harley-davidson-2008-2026","title":"Wilwood GP310 Front Brake Caliper — 4-Piston Billet, Harley-Davidson 2008–2026","description":"\u003cp\u003eWilwood's GP310 is the front caliper upgrade Harley riders have run for years — a 4-piston billet aluminum caliper that bolts directly to the fork leg of 2008–present Harley-Davidson motorcycles. Stainless steel pistons resist corrosion and help control brake fade, high-temperature seals keep lever feel consistent, and the pad anti-rattle clip keeps things quiet. Choose your finish and side; dual-disc front ends take one Left and one Right.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFITMENT\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFits 2008–2026 Harley-Davidson Touring models — Road King, Road Glide, CVO Road Glide, CVO Road Glide ST, Electra Glide, Street Glide, Limited and Ultra (fitment as published by Wilwood: 2008 to present Harley-Davidson motorcycles, direct leg-mounted for single and dual disc models). Built for rotors 0.18–0.25 in thick and up to 11.80 in diameter — the factory 2008+ Touring front rotor size.\u003c\/p\u003e\u003cp\u003eNot sure it fits your bike? Email info@norcalbaggersupply.com — email is the fastest way to reach us — and we'll confirm before you order. You can also call 916-626-9030 (Mon–Fri, 9 AM–5 PM PT).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: Wilwood — part numbers 120-12116-BK \/ 120-12117-BK (Black) and 120-12116 \/ 120-12117 (Chrome), shown on each variant\u003c\/li\u003e\n\u003cli\u003eCaliper: GP310 4-piston, CNC-machined billet aluminum\u003c\/li\u003e\n\u003cli\u003ePistons: four 1.25 in stainless steel, 2.46 sq in total piston area\u003c\/li\u003e\n\u003cli\u003eMount: direct leg mount, 2.72 in lug spacing — no bracket required\u003c\/li\u003e\n\u003cli\u003eRotor range: 0.18–0.25 in thick, up to 11.80 in diameter\u003c\/li\u003e\n\u003cli\u003eBrake pads: Wilwood BP-10 on plate 6208 (pad area 3.65 sq in)\u003c\/li\u003e\n\u003cli\u003eInlet thread: 3\/8-24\u003c\/li\u003e\n\u003cli\u003eWeight: 2.1 lbs\u003c\/li\u003e\n\u003cli\u003eSold individually — order Left and Right for a dual-disc front end\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eINSTALLATION\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBolt-on — the GP310 mounts directly to the fork leg at the factory caliper location. Torque the mounting bolts and bleed the system per your Harley-Davidson service manual, and bed the pads per Wilwood's pad procedure. No official Wilwood install video exists for this caliper — installation is manual-only.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQUESTIONS RIDERS ASK\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color:#d4af37\"\u003eIs this price for one caliper or a pair?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#ffffff\"\u003eOne caliper. Left and Right are separate part numbers — a dual-disc front end needs one of each from this listing.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color:#d4af37\"\u003eDo I need a mounting bracket?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#ffffff\"\u003eNo. The 2008-up GP310 is a direct leg-mount caliper with 2.72 in lug spacing — it bolts to the fork leg where the stock caliper sat.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color:#d4af37\"\u003eWhich brake pads does it use?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#ffffff\"\u003eWilwood BP-10 pads on plate 6208. We stock the replacement pad set — search the store for “Wilwood BP-10 Brake Pad Set”.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color:#d4af37\"\u003eWill it work with my stock front rotor?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#ffffff\"\u003eYes — it is built for rotors 0.18–0.25 in thick up to 11.80 in diameter, which covers the factory 2008+ Touring front rotor. Pair it with Wilwood's drilled stainless rotors for the full upgrade.\u003c\/span\u003e\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Black Powder Coat \/ Right","offer_id":67989101019238,"sku":"120-12116-BK","price":272.0,"currency_code":"USD","in_stock":true},{"title":"Black Powder Coat \/ Left","offer_id":67989101052006,"sku":"120-12117-BK","price":272.0,"currency_code":"USD","in_stock":true},{"title":"Chrome \/ Right","offer_id":67989101084774,"sku":"120-12116","price":561.88,"currency_code":"USD","in_stock":true},{"title":"Chrome \/ Left","offer_id":67989101117542,"sku":"120-12117","price":561.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/6133\/0022\/files\/GP_310_2008_Motorcycle_Black-sm.jpg?v=1794244157","url":"https:\/\/norcalbaggersupply.com\/products\/wilwood-gp310-front-brake-caliper-4-piston-billet-harley-davidson-2008-2026","provider":"NorCal Bagger Supply","version":"1.0","type":"link"}