{"product_id":"m2-m3-m4-g8x-380mm-front-rotor-set","title":"M2\/M3\/M4 G8X 380mm Front Rotor Set","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"a34b22ba-f238-482b-ae15-22ddebd083cd\" data-testid=\"conversation-turn-318\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"a956a805-0a8c-4c4a-a404-7011cfb0c11e\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2-thinking\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words dark markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"350\"\u003eThe Girodisc \u003cstrong data-start=\"13\" data-end=\"22\"\u003e380mm\u003c\/strong\u003e rotor set is a direct OE replacement for \u003cstrong data-start=\"64\" data-end=\"125\"\u003eG8X M2 \/ M3 \/ M4 models equipped with factory iron brakes\u003c\/strong\u003e. It bolts on with \u003cstrong data-start=\"144\" data-end=\"164\"\u003eno modifications\u003c\/strong\u003e, retains \u003cstrong data-start=\"174\" data-end=\"209\"\u003eOEM brake bias and ABS behavior\u003c\/strong\u003e, and delivers a major performance upgrade through reduced rotating mass, improved heat management, and serviceable \u003cstrong data-start=\"325\" data-end=\"336\"\u003e2-piece\u003c\/strong\u003e construction.\u003c\/p\u003e\n\u003ch2 data-start=\"352\" data-end=\"362\"\u003eFitment\u003c\/h2\u003e\n\u003cul data-start=\"364\" data-end=\"504\"\u003e\n\u003cli data-start=\"364\" data-end=\"412\"\u003e\n\u003cp data-start=\"366\" data-end=\"412\"\u003e\u003cstrong data-start=\"366\" data-end=\"412\"\u003eBMW G8X M2 \/ M3 \/ M4 — factory iron brakes\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"413\" data-end=\"504\"\u003e\n\u003cp data-start=\"415\" data-end=\"504\"\u003e\u003cstrong data-start=\"415\" data-end=\"504\"\u003eNot for carbon ceramic brake cars (CCB requires Girodisc iron conversion\/replacement)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"506\" data-end=\"520\"\u003eRotor Specs\u003c\/h2\u003e\n\u003cul data-start=\"522\" data-end=\"576\"\u003e\n\u003cli data-start=\"522\" data-end=\"545\"\u003e\n\u003cp data-start=\"524\" data-end=\"545\"\u003e\u003cstrong data-start=\"524\" data-end=\"537\"\u003eDiameter:\u003c\/strong\u003e 380mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"546\" data-end=\"576\"\u003e\n\u003cp data-start=\"548\" data-end=\"576\"\u003e\u003cstrong data-start=\"548\" data-end=\"560\"\u003eSold as:\u003c\/strong\u003e pair (2 rotors)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"578\" data-end=\"605\"\u003eConstruction \u0026amp; Materials\u003c\/h2\u003e\n\u003cul data-start=\"607\" data-end=\"924\"\u003e\n\u003cli data-start=\"607\" data-end=\"642\"\u003e\n\u003cp data-start=\"609\" data-end=\"642\"\u003e\u003cstrong data-start=\"609\" data-end=\"642\"\u003e2-piece floating rotor system\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"643\" data-end=\"719\"\u003e\n\u003cp data-start=\"645\" data-end=\"719\"\u003e\u003cstrong data-start=\"645\" data-end=\"670\"\u003eHat (center section):\u003c\/strong\u003e U.S.-sourced \u003cstrong data-start=\"684\" data-end=\"719\"\u003e6061-T6 aircraft-grade aluminum\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"720\" data-end=\"811\"\u003e\n\u003cp data-start=\"722\" data-end=\"811\"\u003e\u003cstrong data-start=\"722\" data-end=\"737\"\u003eRotor ring:\u003c\/strong\u003e Girodisc proprietary \u003cstrong data-start=\"759\" data-end=\"772\"\u003ecast iron\u003c\/strong\u003e (poured in the USA, machined in-house)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"812\" data-end=\"924\"\u003e\n\u003cp data-start=\"814\" data-end=\"924\"\u003e\u003cstrong data-start=\"814\" data-end=\"830\"\u003eVane design:\u003c\/strong\u003e \u003cstrong data-start=\"831\" data-end=\"847\"\u003ecurved vanes\u003c\/strong\u003e to act as a centrifugal pump, pulling cooling air through the rotor at speed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"926\" data-end=\"965\"\u003eFloating Hardware (Noise-Controlled)\u003c\/h2\u003e\n\u003cul data-start=\"967\" data-end=\"1339\"\u003e\n\u003cli data-start=\"967\" data-end=\"1069\"\u003e\n\u003cp data-start=\"969\" data-end=\"1069\"\u003e\u003cstrong data-start=\"969\" data-end=\"1012\"\u003e10 high-strength alloy steel drive pins\u003c\/strong\u003e (Girodisc-made, cadmium plated for corrosion resistance)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1070\" data-end=\"1117\"\u003e\n\u003cp data-start=\"1072\" data-end=\"1117\"\u003e\u003cstrong data-start=\"1072\" data-end=\"1095\"\u003eClass 12.9 hardware\u003c\/strong\u003e with hardened washers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1118\" data-end=\"1225\"\u003e\n\u003cp data-start=\"1120\" data-end=\"1225\"\u003e\u003cstrong data-start=\"1120\" data-end=\"1149\"\u003eAnti-noise spring washers\u003c\/strong\u003e on the rotor side to reduce cold rattle while still allowing heat expansion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1226\" data-end=\"1339\"\u003e\n\u003cp data-start=\"1228\" data-end=\"1339\"\u003eFloating design allows the rotor to \u003cstrong data-start=\"1264\" data-end=\"1296\"\u003eself-center between the pads\u003c\/strong\u003e and manage thermal growth more effectively\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv aria-hidden=\"true\" data-edge=\"true\" class=\"pointer-events-none h-px w-px absolute bottom-0\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"GiroDisc","offers":[{"title":"Default Title","offer_id":52178244993205,"sku":"A1-282","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/2500\/6517\/files\/2_1600704c-ba2d-4ed3-af70-d4857b375d49.jpg?v=1768793074","url":"https:\/\/opusautoworks.ca\/products\/m2-m3-m4-g8x-380mm-front-rotor-set","provider":"OPUS Autoworks","version":"1.0","type":"link"}