- Description
- Fitment
- Refund Policy
The MMX Performance 2-piece floating rear rotor set is a direct bolt-on upgrade for the factory rear discs on the G80 M3, G82/G83 M4 and G87 M2, provided your car came with the factory iron brake setup. It replaces the OE one-piece units with a true 2-piece floating design that runs cooler, weighs less, and resists the warping and judder that high-temperature track use can cause on stock rotors.
The 370mm x 24mm rotor rings are paired with separate hats so the ring can expand radially and axially under heat, instead of fighting against itself the way a one-piece rotor does. That floating construction is what dramatically extends pad and rotor life under repeated heavy braking, and is what allows MMX to engineer larger, more efficient directional cooling vanes inside the rotor casting, increasing cooling efficiency by up to 30% versus OE.
For G8X M-Cars driven hard, the rear axle is where you feel the OE limits first under sustained track use, heat builds up faster on the smaller rear discs, and the consequence is uneven pad wear and a soft pedal late in a session. The MMX rear pair addresses both: lower steady-state temperatures, more even pad wear, and consistent rear bias session after session.
The rotor face is slotted (J-hook style) to evacuate gas and pad material under heavy use, and each pair is supplied as left and right-handed directional units so vane geometry is always optimized to the direction of rotation. Bolt-on with no caliper, bracket, or pad changes required.
Product Details
- 2-piece floating disc design (rotor ring + separate hat)
- Dimensions: 370mm x 24mm
- Direct bolt-on replacement for OE iron rear discs
- Up to 30% cooler than OE: up to 30% improvement in cooling efficiency
- Lighter than OEM: reduces unsprung and rotating mass
- SKU MMR30-1602-R
Vehicle Applications
Related Products
- MMX Performance G8X M2 / M3 / M4 2-Piece Floating Rotor Set, Front 380x36mm (matching front axle set)
- MMX Performance G8X M2 / M3 / M4 2-Piece Floating Carbon Ceramic Rotor Conversion, Rear 370x24mm (CCB conversion alternative)
Notes
- Factory iron brakes only. Cars equipped with factory carbon ceramic brakes (CCB) cannot use this rotor as a direct bolt-on.
- Pairs with the matching 380x36mm front rotor set (MMR30-1601-F) for a full-axle upgrade.
- For an iron-to-CCB conversion, see the matching MMX Performance carbon ceramic rear rotor (MMR30-1604-R).
- Includes a 1-year manufacturer warranty against defects in materials and workmanship
- Designed and tested in the United Kingdom
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
