- Description
- Fitment
- Refund Policy
The MMX Performance Rear Differential Raised Poly Bush is a two-position differential mounting bush engineered for the BMW G87 M2, G80 / G81 M3, and G82 / G83 M4. Developed as a direct replacement for the factory rear differential mounting bush, the MMX design can be installed at either the factory differential height or in a +10mm raised position, allowing the same component to support both standard-height and lowered G8X applications.
At the OEM-height position, the polyurethane bush creates a more controlled connection between the rear differential and chassis, reducing unwanted differential movement under acceleration and changing drivetrain loads. For lowered vehicles, positioning the center section at +10mm raises the rear differential mounting point to help restore driveshaft geometry altered by the reduced ride height. This reduces operating angle, heat buildup, and premature wear on the axle shafts and CV joints.
The raised bush is designed as part of the complete MMX Performance G8X differential mounting system. It can be paired with the MMX Front Differential Lift Mount / Cradle (MMR55-1604) for a 3-point configuration, or used with a second rear bush and the MMX Dual Differential Mount (MMR55-1606) to create a full 4-point differential mounting system.
Product Details
- Two-position design with OEM-height and +10mm raised settings
- Direct replacement for the factory rear differential mounting bush
- Polyurethane construction provides increased differential control
- Reduces unwanted drivetrain movement under load
- +10mm position helps correct driveshaft geometry on lowered vehicles
- Helps reduce heat buildup and premature axle shaft and CV joint wear
- Designed for minimal increase in NVH
- Suitable for road and track applications
- Installs into the existing rear differential mounting location without modification
- Compatible with OEM and aftermarket axle shafts
- Designed to integrate with MMX 3-point and 4-point differential mounting configurations
Available Configurations
This listing is available with either one or two MMX Rear Differential Raised Poly Bushes. Select the required quantity from the product options based on your differential mounting configuration.
- 1x Bush: For use at the factory rear differential mounting point and as part of the MMX 3-point differential mounting configuration.
- 2x Bush Kit: Includes two matching bushes for use with the MMX Dual Differential Mount (MMR55-1606) as part of the complete 4-point differential mounting configuration.
Each MMR55-1605 bush features the same two-position center section and can be configured at either OEM differential height or +10mm raised height during installation.
3-Point Differential Mounting Configuration
The MMX 3-point configuration uses the height-adjustable front differential cradle together with one MMR55-1605 rear polyurethane bush. Configure both the front cradle and rear bush at the same OEM or +10mm raised position.
- 1 x MMX Front Differential Lift Mount / Cradle (MMR55-1604)
- 1 x MMX Rear Differential Raised Poly Bush (MMR55-1605)
4-Point Differential Mounting Configuration
The MMX 4-point configuration uses two MMR55-1605 rear polyurethane bushes together with the MMX Dual Differential Mount. The second bush occupies the additional rear mounting location left unused by the factory. Configure the complete system at the same OEM or +10mm raised position.
- 1 x MMX Front Differential Lift Mount / Cradle (MMR55-1604)
- 2 x MMX Rear Differential Raised Poly Bushes (MMR55-1605)
- 1 x MMX Dual Differential Mount (MMR55-1606)
Installation
The MMX Rear Differential Raised Poly Bush replaces the existing factory bush at the rear differential mounting point and installs into the factory mounting location without modification. The two-position center section allows the installer to select either the factory differential height or +10mm raised position during installation.
For the 4-point configuration, select the 2x Bush Kit from the product options. The second bush installs into the additional rear mounting location left unused by the factory and works with the MMX Dual Differential Mount (MMR55-1606).
Related Products
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.
Labor Fees (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
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.
