Description
The MMX Performance F2X / F3X Billet Rear Subframe Insert Set is a must-have upgrade for BMW enthusiasts looking to improve rear suspension response and eliminate unwanted subframe movement. Designed and engineered in-house in the UK, this kit enhances suspension geometry, improves handling, and delivers a more connected driving experience, particularly during high-performance cornering and acceleration.
These precision CNC-machined inserts are crafted from durable 6061-T6 billet aluminum, designed to fill the voids in the factory rubber subframe mounts. This eliminates the "slop" that can cause the rear end to feel vague, enhancing rear-end stability and reducing understeer. By reducing rear subframe movement, the inserts maintain proper suspension geometry under dynamic conditions, providing improved handling, especially when combined with aftermarket sway bars and suspension upgrades.
Installation is quick and simple—complete the upgrade in under an hour with no need to remove the subframe or differential. The inserts are fully reversible, making this a low-risk upgrade. Additionally, thanks to their robust construction, the billet aluminum components will not wear out over time, ensuring a lasting performance improvement.
One of the key concerns with subframe inserts is potential NVH (Noise, Vibration, and Harshness) transfer into the cabin. Rest assured, the MMR insert set is designed to transfer minimal NVH, so you can enjoy the benefits of enhanced handling without any intrusive noise or vibration.
Tested extensively by MMR and independent BMW enthusiasts, these inserts are designed to fit a wide range of F2X and F3X models, including diesel, petrol, manual, and automatic variants.
Key Features:
- Billet CNC-machined 6061-T6 aluminum body ensures durability and long-lasting performance
- Fills voids in factory rubber rear subframe mounts, reducing movement
- Enhances rear suspension response and geometry for improved handling and cornering performance
- Easy installation: complete the upgrade in under an hour without removing the subframe or differential
- Minimal NVH transfer—enhanced performance with little to no added noise or vibration
- Suitable for both F2X and F3X BMW models, including diesel, petrol, manual, and auto variants
- Increases rear subframe stability during launches and acceleration
Fitment Information:
- F20 1-Series
- F22 / F23 2-Series
- F30 / F31 / F34 3-Series
- F32 / F33 / F36 4-Series
