{"product_id":"braketech-ventilated-caliper-racing-pistons-32mm-harley-touring","title":"BrakeTech Ventilated Caliper Racing Pistons — 32mm for OEM Brembo Calipers, Harley Touring 2008–2026","description":"\u003cp\u003eBrakeTech's ventilated racing pistons replace the factory aluminum pistons in your OEM Brembo calipers. The vented stainless design moves far less heat into the brake fluid — BrakeTech rates the thermal conductivity reduction at up to 94% versus aluminum — so the lever stays firm and consistent when the brakes get hot.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFITMENT\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits 2008–2026 Harley-Davidson Touring models running the factory OEM Brembo 4-piston front or rear calipers — Road King, Street Glide, Road Glide and Electra Glide families (fitment as published by BrakeTech). One set services one 4-piston caliper.\u003c\/p\u003e\n\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\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: BrakeTech — part number 904224\u003c\/li\u003e\n\u003cli\u003ePiston diameter: 32mm\u003c\/li\u003e\n\u003cli\u003eQuantity included: set of 4 pistons (one 4-piston caliper)\u003c\/li\u003e\n\u003cli\u003eMaterial: proprietary high-grade 300-series stainless steel (replaces factory aluminum pistons)\u003c\/li\u003e\n\u003cli\u003eDesign: ventilated — twelve ventilation ports per piston create an insulating air gap at the pad side\u003c\/li\u003e\n\u003cli\u003eFluid Maximizer reverse chamber increases fluid volume behind the piston to retard heat buildup\u003c\/li\u003e\n\u003cli\u003eSurface: super-finished to improve piston retraction and reduce brake drag\u003c\/li\u003e\n\u003cli\u003eAlso fits: 2008–2017 V-Rod \/ VRSC models with factory Brembo calipers (per BrakeTech)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eINSTALLATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCaliper rebuild work — the pistons fit your existing OEM Brembo calipers. BrakeTech publishes its own instructions here: \u003ca href=\"https:\/\/brocksperformance.com\/content\/Instructions\/BrakeTech\/998194.pdf\"\u003eCaliper Racing Piston Installation Instructions (PDF)\u003c\/a\u003e. No official BrakeTech install video is published for this kit — installation follows the written instructions and your service manual.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQUESTIONS RIDERS ASK\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color:#d4af37\"\u003eWhat do these actually fix?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#ffffff\"\u003eHeat soak. Under hard braking, aluminum pistons conduct heat straight into the fluid, which can boil and fade the lever. BrakeTech's ventilated stainless design cuts thermal conductivity by up to 94% (their figure), and the super-finished surface improves retraction, reducing drag and pad wear.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color:#d4af37\"\u003eHow many sets does my bike need?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#ffffff\"\u003eOne set of four pistons services one 4-piston caliper. A dual-front-disc Touring bike has two front calipers plus the rear, so order a set per caliper you want to upgrade.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color:#d4af37\"\u003eWill these fit aftermarket calipers?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan style=\"color:#ffffff\"\u003eNo — they're built for the factory OEM Brembo 4-piston calipers at 32mm, as listed above. If you're running something else, email us the caliper details before ordering.\u003c\/span\u003e\u003c\/p\u003e\n","brand":"BrakeTech","offers":[{"title":"Default Title","offer_id":67922276188262,"sku":"904224","price":219.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/6133\/0022\/files\/904146_BT_CRP_BK9_BrakeTech_Caliper_Racing_Pistons_Zoom__77297.1790002910.webp?v=1793834121","url":"https:\/\/norcalbaggersupply.com\/products\/braketech-ventilated-caliper-racing-pistons-32mm-harley-touring","provider":"NorCal Bagger Supply","version":"1.0","type":"link"}