Your BMW's suspension mounting points are notorious for failing to hold up over time. This type of failure is accelerated and aggrevated on cars that are driven aggressively, tracked or raced. The longer you let your car go without repairing or reinforing these mounts, the closer it gets to crumbling apart. Reinforcing existing chassis parts is just simple preventitive maintenance.
Available for the following BMWs: (click icon to change BMW)
E46 Front Subframe Reinforcement Kit
(more info) As E46s get older and see more track-use, they start develop cracks and bends in places that see a lot of stress. One of the most stressful areas is the front subframe. It's a good idea to reinforce your front subframe the next time you're doing any suspension work. This kit reinforces the upper and lower tabs of the subframe where the motor mount is located. Requires welding.
Part #: TDR4675F99
Price: $44.95 (USD)
Turner Motorsport Camber Arm Reinforcement Kit
(more info) This TMS reinforcement kit is used to reinforce the stock rear lower camber arms just like BMW Motorsport does for its own production-class racing efforts. Factory camber arms are made to bend or split above certain loads to break in the event of an accident to help absorb the impact. Under race applications these loads can be exceeded under normal cornering forces. A main benefit of using the stock camber arms is that many racing classes allow for reinforcement of this part, and it increases the overall strength of the suspension.
With welding experience, this kit can easily be installed by you. These arms differ from our own adjustable camber arms in that you can still use a streetable bushing on either end making it great for dual purpose street/track cars. They are ideal for racing classes that do not allow for alternate suspension components but do allow for alternate bushing materials. Additionally, the factory control arm is much lighter than most aftermarket camber arms, helping reduce the total unsprung weight.
KMAC bushings are
recommended if more camber adjustment is desired.