Subframe Bushings

A BMWs sub-frame is the heart of the suspension - as the subframe twists and shifts under load all of the suspension mounting points also move. The rear suspension feels loose and lacks precision. As rubber or hydroelastic bushings wear the bushing deflection gets worse. If you have a highly tuned 335i/xi you're putting even more strain on weak bushings. The solution is a stiffer and more durable material. Even BMW has moved to solid mounts on the F10 M5 and F8X M3/M4. These fully solid E82/E90/E92 aluminum mounts have zero deflection - the subframe does not move at all. The rest of the suspension can work as designed and maintain the proper alignment and motion ratios. The driver will notice the difference as the car is more stable and the handling is more precise.

Although we designed these for use in our racecars, they can work on the street so long as the driver can tolerate some additional noise, vibration, and harshness. These mounts are CNC machined in the USA and made with high-grade aluminum. The set is for all four subframe mounts.

These solid rear sub frame mounts fit: 
2008-2012 E82 BMW 128i 135i 
2006-2011 E90 BMW 325i 328i 330i 335d 335i - Sedan 
2006-2011 E91 BMW 325i 328i - Wagon 
2007-2012 E92 BMW 328i 335i 335is - Coupe 
2007-2012 E93 BMW 328i 335i - Convertible 

TMS E36 solid sub-frame bushings are designed for track and racecars to remove twisting and flexing of the subframe where it mounts to the rear floor. This twisting is one of the causes of rear subframe/floor failure in E36 cars. We originally developed these for our SCCA SPEED World Challenge cars. A BMW's subframe is the heart of the suspension. Because the subframe is mounted with rubber isolators, when the subframe moves, so does the rest of the suspension mounting points. As the rubber wears and becomes more pliable, the alignment and suspension settings move even more. Replace the stock rubber bushings to limit drivetrain and suspension movement and keep your car set up the way it's supposed to be.

Our mounts are designed using a CAD program with further attention paid to making the mount as light as possible. We also notched the flanges to allow the use of the BMW factory removal tools. One front bushing is slotted to allow for compliance between manufacturing standards as BMW specifies. These bushings are CNC machined out of high grade billet aluminum.

Click for installation instructions. (PDF)

The Powerflex Rear Subframe Rear Bushing Insert for the BMW E36 3 Series (1990-1998) is an innovative performance enhancement designed to improve the stability and handling of the rear suspension. This insert works in conjunction with the existing rubber bushings, providing significant upgrades in responsiveness and durability.

Key Benefits:

1. Improved Rear Suspension Control: The insert is crafted from high-performance polyurethane, which reduces the amount of flex and movement in the rear subframe. This increased stiffness enhances stability during cornering, resulting in better traction and handling, especially under dynamic driving conditions.

2. Durability and Longevity: Unlike factory rubber bushings, which can wear out and degrade over time due to exposure to heat and road conditions, Powerflex inserts are built to withstand harsh environments. Their robust construction ensures that they maintain performance levels longer, providing reliable support to the subframe.

3. Enhanced Handling Characteristics: By minimizing unwanted movement, these inserts help to optimize the alignment of the rear suspension components. This leads to improved handling response and cornering capabilities, giving drivers more confidence and control during spirited driving.

4. Simple Installation Process: Specifically designed for the E36 3 Series, these inserts fit directly into the original subframe bushings without any need for modification. The installation is straightforward, making it an accessible upgrade for DIY enthusiasts and professionals alike.

5. Versatile Application: Whether for daily driving, track use, or spirited weekend rides, these inserts are suitable for various driving styles. They enhance the overall performance of the rear suspension, making them a great addition for both casual drivers and performance enthusiasts.

This upgrade is ideal for BMW E36 3 Series owners seeking to elevate their vehicle's rear suspension performance and responsiveness. The Powerflex Rear Subframe Rear Bushing Insert offers a reliable solution for improving handling, stability, and overall driving enjoyment, making it an excellent choice for enhancing the driving experience.