Why fit?
Designed and engineered in-house in the UK, the MMR rear subframe insert kit for the BMW F2x and F3x chassis is designed to limit movement in the factory rear subframe mounts to maintain proper suspension geometry when cornering and improve the responsiveness of the rear suspension and differential.
Benefits of fitting?
Designed and engineered in-house in the UK, the MMR rear subframe insert kit for the BMW F2x and F3x chassis is designed to limit movement in the factory rear subframe mounts to maintain proper suspension geometry when cornering and improve the responsiveness of the rear suspension and differential. Installation is very simple, can be performed in under an hour, and is completely reversible.
By filling small voids in the four factory mounts as well as limiting vertical movement, the insert set eliminates the associated slop to ensure that you experience a more refined, connected driving experience, especially when driving at the limit. The billet aluminium parts will not wear over time and offer a lasting performance improvement.
Worried about noise? NVH is a measurement of how much noise, vibration, & harshness gets transmitted into a vehicle’s cabin. Based on feedback, MMR inserts transfer little to none NVH into the cabin. NVH is subjective, so some users may find NVH to be increased or decreased from our rating. If you are experiencing higher than quoted NVH with this product, please evaluate the installation to ensure the components are installed correctly.
The BMW F2x and F3x series use rubber rear subframe mounts that deflect under load, causing the rear end to feel vague and loose, as well as leading to less-than-optimal suspension geometry and increased understeer. These precision-machined billet aluminium inserts are designed to fill voids in the factory rear subframe mounts, and limit subframe movement without sacrificing ride quality or introducing any perceivable additional noise, vibration, or harshness into the cabin. The result is a more refined, connected driving experience, as well as improved effectiveness of aftermarket rear sway bar upgrades and suspension components.
These inserts were tested extensively by MMR and independent BMW enthusiasts before release on multiple F2x and F3x vehicles. The diff inserts fit petrol, diesel, manual and auto variants.
Confirmed
applications.
MAKE:
BMW
MODEL:
3 Series
CHASSIS:
F30 | F31 | F34
ENGINE:
ALL
YEARS:
2011 - 2019
Features:
> Billet CNC - machined 6061-T6 Aluminium body
> Fills void in OE Subframe rubber bushings
> Practically no additional NVH transfer inside vehicle
> Easy install with Subframe remaining institute
> Reduces rear subframe movement during launches & acceleration
> Helps maintain correct suspension geometry under dynamic loading
Fitting note:
> Our billet subframe inserts are easily installed by any experienced technician, and fitment is fully reversible should you ever wish to remove them.
> We strongly recommend installing our billet diff insert kit at the same time.
How we develop.
Every MMR Performance upgrade is developed and tested here in the UK by our expert engineering team of BMW enthusiasts.
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Nothing gets the MMR logo until we've thoroughly proven it on road, track and dyno.
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That's the MMR Performance difference.
How to buy?
Our network of expert MMR Performance dealers can supply the full range, together with product guidance and advice, plus often an experience fitting service.
If you haven't got a MMR Performance Partner Dealer close to you, don't worry! Remember you can buy direct from our MMR Performance webshop. Click here to browse and shop online, for worldwide despatch.
