BMW E85 Chassis Reinforcement Kits & Parts

If you haven't already upgraded to Adjustable Camber Arms, your stock rear lower wishbones are letting your down. The stock rear camber arm/wishbone is designed to be flexible and weak. In an impact, it's designed to bend or even break to absorb energy and prevent damage to other more vital components. This is great on a regular street car. But on a track car, or heavily modified street car, these arms can bend just from cornering forces and that can introduce radical camber changes that will throw off the balance and handling of the car. This reinforcement solves all of that by tying the two sections of the arm together. This creates a single solid arm with minimal flex in the arm itself. We can't take credit for this innovation - BMW recognized the problem and did this on their factory Group N racecars. If you haven't made the jump to adjustable arms, or your racing class still requires the stock camber arm, then this kit is a must! Installation requires welding.

Click here for installation instructions

This item fits the following BMWs:
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si Z4 M Roadster M Coupe

The motor mount area on a subframe is one of those easily-forgotton areas that may be hiding a serious problem. The subframe on the E46 has a gusset ('ear') welded on for the motor mounts. These gussets take the stress of the motor mount as the engine torques (more upgrades = more torque = more stress). Worn motor mounts only transfer more stress to the subframe. Unfortunately, the sheetmetal will fatigue over time even though the gusset is reinforced from the factory. Check for cracks along the welds and an uneven plane from the subframe to the gusset. A total failure of the guesset will shift your engine to the side and forward, taking out many other components along the way and leading to a very costly repair.

The next time you replace the motor mounts, oil pan gasket, checking your oil pump nut, or any other time you drop the front subframe, you should install these reinforcements. This kit comes with steel reinforcing plates that are welded to the underside of the guesset as well as plates to close off the bottom of the gusset for extra strength. Instructions included.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 328i 328ci 330i 330ci M3

The ORIGINAL rear trailing arm bushing / RTAB shim kit -- and still the best! The Turner rear trailing-arm bushing limiter kit creates a stiffer rear suspension without sacrificing ride quality. Stock trailing arm bushings are known for failure, on both the E36 and E46 BMW chassis. This kit is a perfect upgrade from stock, as it reduces bushing deflection, dramatically increases bushing life, improves handling, and all without the harshness of "race-only" bushings, and while maintaining completely silent operation -- no squeaks and no vibration, whatsoever.

By combining these limiters with stock bushings, this is a great low cost and effective suspension performance enhancer. Each pair of blue aluminum "shims" essentially sandwich the stock rubber bushing to control their lateral movement. By limiting the amount of side-to-side play of the stock bushing, drivers will have increased driver feel thanks to the reduction of toe variation caused by the squirm of the stock rubber bushings. This also reduces duress on the bushing, giving your newly installed bushings a dramatically longer lifespan (a welcome benefit for both pure street or tracked cars). Some stock class racing series even allow this kind of modification, because the stock bushing is still being used.

Kit includes: 4-Blue anodized aluminum bushing limiters, eight 5mm allen bolts and a drilling template.

Need bushings? Click here for replacement trailing arm bushings.

Click for installation instructions.

This RTAB limiter / shim kit fits the following BMWs:
1992-1999 E36 3 Series including 318i, 318is, 325i, 325is, 328i, 328is & 323is
1995-1999 E36 M3 3.0 & 3.2 (coupe & sedan)
1999-2005 E46 3 Series including 323i, 323Ci, 325i, 325Ci, 325xi, 328i, 328Ci, 330i, 330xi & 330Ci
2001-2006 E46 M3 coupe & convertible
2004-2011 X3 2.5, 3.0
2003-2009 Z4 Roadster & Coupe (2.5, 3.0, 3.0si)
2006-2009 MZ4 M Roadster / M Coupe