MMX Billet Rear Subframe Inserts for BMW F2x and F3x
Unlock sharper handling, tighter rear end control, and a more connected drive with MMX Billet Rear Subframe Inserts for the BMW F2x and F3x platform. Engineered and machined in the UK from CNC 6061-T6 aluminium, this precision subframe insert kit fills the voids in the four factory rear subframe mounts to reduce subframe movement, maintain correct suspension geometry, and improve responsiveness from the rear suspension and differential during hard cornering, braking, and acceleration.
If you are searching for BMW F2x F3x subframe inserts, BMW rear subframe bush insert kit, F series rear subframe upgrade, MMX billet aluminium subframe inserts, BMW handling upgrade for 1 Series 2 Series 3 Series 4 Series, this is the proven performance solution for fast road and track day use without sacrificing daily comfort.
Why upgrade your BMW F2x and F3x rear subframe bushes
- Factory rubber subframe mounts deflect under load which makes the rear feel vague and loose
- Subframe movement disrupts suspension geometry and rear end stability in dynamic driving
- MMX billet inserts fill the small voids and limit vertical movement to cut slop and tighten the chassis
- Deliver a more refined, direct connection with the road and consistent handling at the limit
Key features
- Billet CNC machined 6061-T6 aluminium construction
- Fills voids in OE rear subframe rubber mounts, limits vertical movement
- Helps maintain correct suspension geometry under cornering, braking, and acceleration
- Reduces rear subframe movement during launches and hard driving
- Enhances the effectiveness of aftermarket rear anti roll bars and suspension upgrades
- Practically no additional NVH transfer reported inside the cabin
- Simple install, typically under one hour, completely reversible
Fitment
Designed for BMW F2x and F3x chassis. Compatible with diesel and petrol models, manual and automatic variants across the F series 1 Series, 2 Series, 3 Series, and 4 Series platforms.
NVH information
NVH refers to noise, vibration, and harshness that may transfer into the cabin. Based on user feedback, MMX inserts transfer little to none. NVH is subjective, so experiences can vary. If you encounter higher than expected NVH, please check the installation to ensure all components are seated and torqued correctly.
Installation and fitting
Installation is straightforward with the subframe in situ, can be completed in under an hour, and is fully reversible. For professional fitting, choose Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Proven by enthusiasts
We have used these MMX billet subframe inserts on our own builds and customer cars with excellent results. Drivers report a tighter rear end, improved stability, and a more precise, confidence inspiring feel on both road and track.
What you get
A complete set of precision billet inserts engineered to fill the small voids in the four factory rear subframe mounts on BMW F2x and F3x chassis.
Order your MMX BMW F2x F3x rear subframe insert kit today for a simple, high value handling upgrade that delivers durable, long term performance without compromising daily drivability.