{"product_id":"girodisc-2-piece-front-rotors-bmw-g87-m2-g80-m3-g82-m4-oe-iron-rotors","title":"Girodisc 2 Piece Front Rotors BMW G87 M2 \/ G80 M3 \/ G82 M4 (OE Iron Rotors)","description":"\u003cp\u003e\u003cspan\u003eUpgrade the braking performance of your BMW G8X M2, M3, or M4 with the GiroDisc 380mm Two-Piece Front Rotor Kit. Designed as a direct replacement for vehicles equipped with factory iron brakes, these fully floating rotors retain the factory 380mm diameter and OEM brake calipers while improving cooling capability and reducing unnecessary rotating and unsprung mass.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach rotor uses GiroDisc's proprietary high-carbon iron friction ring paired with a lightweight \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6061-T6 aluminum center hat\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The two-piece construction allows the iron ring to be replaced independently when worn, allowing the aluminum hat to be reused and reducing long-term service costs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCooling performance is a major advantage of the GiroDisc design. Each rotor incorporates \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e72 curved internal cooling vanes compared with just 30 vanes in the factory discs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. These directional vanes act as a centrifugal pump, drawing air through the center of the rotor and helping evacuate heat during repeated hard braking.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe fully floating mounting system allows the friction ring to expand independently as temperatures increase while maintaining proper alignment with the brake pads. GiroDisc uses high-strength alloy-steel drive pins, spring clips, and spring washers to provide the thermal benefits of a race-oriented floating rotor while remaining quiet enough for street use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor G8X owners looking for a brake upgrade without moving to a complete big brake kit, GiroDisc's A1-282 provides improved thermal management, serviceability, and motorsport-derived construction while retaining the factory calipers and brake system architecture.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFitment Notes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBMW G87 M2\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBMW G80 M3\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBMW G82 M4 Coupe\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBMW G83 M4 Convertible\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for vehicles equipped with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efactory iron brakes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes not fit factory carbon ceramic brake applications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDirect replacement for the factory front rotors\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRetains the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efactory front brake calipers\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eNo permanent vehicle modifications required\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReplacement friction rings are available separately as \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGiroDisc D1-282\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eIncluded\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 GiroDisc left front two-piece rotor assembly\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 GiroDisc right front two-piece rotor assembly\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReusable 6061-T6 aluminum rotor hats\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGiroDisc high-carbon iron friction rings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFully floating drive hardware\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Specs\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGiroDisc Part Number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eA1-282\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProduct Type: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eTwo-Piece Fully Floating Front Rotors\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRotor Diameter: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e380mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRotor Thickness: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e36mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMinimum Rotor Thickness: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e34mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWeight: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e28.2 lb per rotor assembly\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCooling Vanes: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e72 Curved Vanes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFactory Cooling Vanes: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e30\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFriction Ring Material: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGiroDisc Proprietary High-Carbon Cast Iron\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCenter Hat Material: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6061-T6 Aluminum\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCenter Hat Finish: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBlack Anodized\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDrive Pin Material: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHigh-Strength Alloy Steel\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDrive Pin Finish: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eCadmium Plated\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRotor Design: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFully Floating\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReplacement Ring Part Number: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eD1-282\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eManufacturing Location: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBellingham, Washington, USA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eQuantity: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSold as a Pair\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e72 curved cooling vanes versus 30 in the factory rotors\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e provide substantially greater internal airflow and heat evacuation during repeated hard braking\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFully floating \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003etwo-piece construction\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e allows the rotor ring to expand under extreme temperatures while maintaining proper alignment with the brake pads\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLightweight \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6061-T6 aluminum hats\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e help reduce unsprung and rotating mass compared with conventional one-piece rotor construction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProprietary \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ehigh-carbon iron friction rings\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e are engineered to withstand the elevated temperatures and repeated heat cycles associated with performance driving and track use\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eReusable center hats and replaceable D1-282 friction rings\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e reduce long-term servicing costs once the original rings reach their wear limit\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eManufactured in-house by GiroDisc in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBellingham, Washington\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e using domestically sourced materials for the major rotor components\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GiroDisc","offers":[{"title":"Default Title","offer_id":67726947877184,"sku":"GIRA1-282","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/7587\/4624\/files\/408mm72v__28533_23249a15-d334-4898-8ae9-b2b3fc8e24af.jpg?v=1791382962","url":"https:\/\/www.forzamotorworks.com\/products\/girodisc-2-piece-front-rotors-bmw-g87-m2-g80-m3-g82-m4-oe-iron-rotors","provider":"Forza Motor Works","version":"1.0","type":"link"}