FJ MOTORWERKES
FJ Motorwerkes X3M/X4M Diff Bolt and Collar Upgrade
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Pickup available at BMG Performance
Usually ready in 24 hoursThe only ultimate complete kit on the market - Uprated Diff Bolt, End Bushing & collar kit, fix For BMW X3M/X4M Exclusive to FJ Motorwerkes.
Our latest revision is now UK made, using premium CNC machine engineering and stainless steel components only.
Experience the enhanced performance of your X3M & X4M F97 F98 with our premium uprated differential bolt, bush & collar kit.
Common issues like diff bolt is no longer a concern. Whether you enjoy drifting, launching, or aggressive driving, our kit ensures a smooth and reliable experience.
Our kit greatly reduces the risk of bolt failure, providing peace of mind for high-performance driving and power, bolts are known to deform on any level including stock. Whether your car is stock power or tuned this is the true complete kit to reduce potential failure causing $$$’s in damages (Diff failure, driveshafts etc etc).
Complete Kit in stainless steel includes:
- Extreme strength, upgraded-sized bolt
- Reinforced custom end solid bushing
- Reinforced & strengthened CNC collar
- Reinforced CNC front washer
- Reinforced CNC crush washer
- Reinforced CNC step down bushing
- Grooved fast lock nut
- Drill bit for installation
- Full instructions
Our upgraded bolt is over 39% stronger than the BMW revised bolt and significantly more durable than the original BMW part. To be precise our bolt can take 170,000 psi pressure (Extreme strength bolt). Paired with our solid end bushing to create seamless fix.
These are tested kits, not many owners know the true condition of their current bolt due to location, very high ratio who do remove confirm failure (Bent), whilst other vehicle’s make clunking sound or grinding/whining which reflects the bolt being nearer the end of it’s life - Do not wait around for sounds, this can cause pre mature wear on other components. We advise this fix.
BMW are aware of issue, they revised bolt in late 2021 but unfortunately it’s proven unsuccessful.
While we recognise other offerings “solid bushings” or “lockdown braces”. Based on firsthand feedback on our test vehicles. Those solutions may create excessive noise and vibrations in the cabin at low speeds, making daily driving uncomfortable. Additionally, lack of flexibility, which can lead to component failure over time. Solid bushings are best suited for track vehicles.
Pairs well with
FJ Motorwerkes X3M/X4M Diff Bolt and Collar Upgrade
Availability
Items can be in stock locally or from the USA.
Some items can also be special order or pre-order items that can take longer delays.
Please be sure to contact us for availabilities!
Shipping
No surprise fees at your door! Shop in confidence knowing that there are no additional fees at the door from orders coming from abroad.
We only ship with the most reputable shipping companies to ensure your products arrive safely to you.
Additional shipping insurance and signature required options are available!
Our Goal
Our goal is to be able to offer you a high quality product that will best suit your needs. If you have any questions, contact us and we can get you in contact with a Build Specialist.
Built by BMG Performance
We hold high quality standards when working on cars at BMG Performance. The precision in fitment, build quality and attention to detail is what we look for when working on your vehicle.
