{"product_id":"mmx-performance-f8x-m2-m3-m4-2-piece-floating-rotor-set-rear-370x24mm","title":"MMX Performance F8X 2-Piece 370mm Floating Rear Rotors M2 M3 M4","description":"\u003cp\u003eThe MMX 2-Piece 370mm Floating Rear Rotor Set completes the F8X rotor upgrade started by the matching MMR30-1001F front set. Designed and tested by MMX as a direct replacement for the OEM iron rear disc, this is a true two-piece floating rotor (left- and right-handed specific) built to drop the OEM rotor's heat-induced limitations without any caliper or hub modification.\u003c\/p\u003e\n\n\u003cp\u003eEach rotor pairs a proprietary high-carbon iron friction ring with a CNC-machined 6061-T6 aircraft-specification aluminium hat, connected by a floating bobbin system. That floating mount allows full radial and axial thermal expansion as the rotor heats, eliminating the warping and surface cracking that single-piece OEM discs suffer under repeated heavy braking. The aluminium hat reduces unsprung and rotational mass at the rear axle for improved ride and traction control response.\u003c\/p\u003e\n\n\u003cp\u003eThe friction face is laid out with 36 directionally curved cooling vanes that act as a centrifugal pump as the rotor spins, drawing air through the centre of the disc and out through the friction ring. MMX states the assembly delivers up to 30% improved cooling efficiency over the OEM rear rotor, translating directly into less rear-axle fade on track, more consistent pad release behaviour, and longer rotor life across track-day cycles. MMX's signature directional grooves on the friction surface improve initial bite and clear pad gases and debris from the pad face.\u003c\/p\u003e\n\n\u003cp\u003eThis rotor uses the OEM rear caliper that came on F80 M3, F82\/F83 M4, and the original N55-engined F87 M2, and it accepts OEM or upgraded MMX RP650 brake pads. It is engineered as the matching rear pair to the MMR30-1001F front set, completing a full F8X iron rotor upgrade.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDiameter × thickness: 370mm × 24mm\u003c\/li\u003e\n  \u003cli\u003eTrue 2-piece floating construction with floating bobbin mounting system\u003c\/li\u003e\n  \u003cli\u003eProprietary high-carbon iron rotor ring with directional groove pattern\u003c\/li\u003e\n  \u003cli\u003e6061-T6 aircraft-specification aluminium hat (CNC-machined)\u003c\/li\u003e\n  \u003cli\u003e36 directionally curved internal cooling vanes\u003c\/li\u003e\n  \u003cli\u003eSKU: MMR30-1002R\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1× pair of 2-piece floating rear rotors (left + right directional, 370mm × 24mm)\u003c\/li\u003e\n  \u003cli\u003eFloating bobbin hardware pre-installed\u003c\/li\u003e\n  \u003cli\u003eBrake pads not included: sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/m2-f87\"\u003eBMW M2 (F87)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/m3-f80\"\u003eBMW M3 (F80)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/collections\/m4-f82-f83\"\u003eBMW M4 (F82 \/ F83)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRelated Products\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/products\/mmx-performance-f8x-m2-m3-m4-2-piece-floating-rotor-set-front-380x30mm\"\u003eMMX F8X 2-Piece 380mm Floating Front Rotor Set\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/ind-distribution.com\/products\/mmr-performance-f8x-m2-m3-m4-rp650-performance-brake-pad-set-front\"\u003eMMX RP650 Performance Front Brake Pads F8X\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNOT confirmed for F87 M2 Competition or M2 CS.\u003c\/strong\u003e Authorized-dealer copy explicitly markets this product for \"M2 (non-Competition).\" The M2 Competition \/ M2 CS use the same S55 M3\/M4 rear hardware platform but exact rotor specification has not been confirmed by MMX, please verify directly before ordering.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNOT compatible with the M Carbon Ceramic Brake (CCB) package.\u003c\/strong\u003e CCB cars use a carbon-ceramic friction surface and CCB-specific calipers.\u003c\/li\u003e\n  \u003cli\u003eDiscs are directional: left- and right-handed specific. Verify orientation before installation.\u003c\/li\u003e\n  \u003cli\u003eSold as a pair. Pair with MMR30-1001F front set for a complete F8X rotor refresh.\u003c\/li\u003e\n  \u003cli\u003eBrake pads are sold separately. Consider MMX RP650 rear pads (MMR27-0501R) for a matched fast-road brake setup.\u003c\/li\u003e\n  \u003cli\u003eIncludes a 1-year manufacturer warranty against defects in materials and workmanship\u003c\/li\u003e\n  \u003cli\u003eDesigned and tested in the United Kingdom\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IND Distribution","offers":[{"title":"Default Title","offer_id":47411629097154,"sku":"MMR30-1002R","price":1479.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/0784\/7874\/files\/MMX-F8X-RRotor.jpg?v=1776276732","url":"https:\/\/grocerygetterperformance.com\/products\/mmx-performance-f8x-m2-m3-m4-2-piece-floating-rotor-set-rear-370x24mm","provider":"Grocery Getter Performance","version":"1.0","type":"link"}