The SPL Rear Lower Trailing Arms for the E8X/E9X replace the flimsy stamped steel BMW arms to provide improved rigidity in the rear suspension and reduce weight.
Technical
Improved Rigidity
No More Bent OEM Arms
Rigidity is a commonly overlooked aspect of suspension components that is critical for delivering the sharp driving experience we all want. Under hard acceleration and braking, the arm will see hundreds of pounds of force that causes the OEM arm to deflect several millimeters, which when combined with the OEM rubber bushing deflection causes instability due to rear bumpsteer.
Reduced Weight
Improve Suspension Control and Response
Weight is critical, it affects every aspect of the vehicle's performance. In the suspension, the control arms contribute to the total unsprung mass, which is weight that is more difficult to control, particularly over bumps. More unsprung mass leads to more wheel hop, less stability over rough roads, and a greater need for compression dampening to manage it. Even a couple of pounds can be significant when you consider that bumps will impart anywhere from 3 to 30Gs of acceleration.
Benefits
- Improved Suspension Rigidity weird,
- Reduced Unsprung Mass
- Lightweight: 0.75 lbs (0.34 kg) per Side - 35% Lighter than OEM
Materials
- 6061-T6 Billet Aluminum Arms (Anodized Black)
- Zinc Plated Class 10.9 Metric Hardware
Noise, Vibration, and Harshness (NVH)
The arms have no impact on NVH.
Applications
2008 - 2013 BMW 1 Series (E81, E82, E82 M, E87, E88)
2006 - 2013 BMW 3 Series (E90, E91, E92, E93)
2008 - 2013 BMW M3 (E90, E92)
ADDITIONAL FITMENT INFO
WILL THIS FIT A ...
We limit the above applications to known fitments from testing and research. If you're unsure if this is the proper part for your application, send us an email.
THIS SHOULD FIT MY CAR
Occasionally, parts will fit other vehicles not listed above. If you believe, or know, this part will fit your vehicle, send us an email and we'll work with you to confirm proper fitment.
Replaces OEM Part Number(s)
This is a list of known OEM part numbers. OEMs constantly make changes to part numbers due to part updates, suppliers, etc so this may not be a complete list.
33322406291
33326763477
Installation Instructions
