Subframe

Rear Axle Carrier Panel (RACP) failure is a well-documented issue that plagues all BMW E46 models. Due to thin sheet metal mounting, the forces applied during cornering, acceleration, and braking create stress fractures in the carrier panel, resulting in large cracks or breaks that risk the structural integrity of your chassis. To fix this issue, many enthusiasts opt to install weld-in reinforcement plates on the underside of the RACP. While this remedies the formation of additional stress cracks and adds rigidity to failure-prone areas, it does not prevent the entire carrier panel from flexing during high-performance driving.

Our all-new Rear Subframe Reinforcement Brace is engineered to add structure to the E46's rear chassis under high-stress conditions, eliminating the common weak points in the RACP while providing the confidence you need for performance driving. Don't let chassis flex limit your car’s potential—upgrade your E46 with the Turner Motorsport Rear Subframe Reinforcement Brace today!

How It Works:

During performance driving, the Rear Axle Carrier Panel (RACP) must react the forces of longitudinal and lateral accelerations. During forward acceleration, the differential transmits torque through the subframe to the RACP, forcing the rearmost subframe mounting points downward. This downward movement flexes the carrier panel, reducing its ability to handle torque efficiently. By linking the rearmost subframe mounting points to the rear shock towers, downward flex is restricted, resulting in improved torque transfer and stability. Alternatively, high-grip cornering generates lateral acceleration (side-to-side) forces across the RACP. Similar to how a rear strut brace functions, connecting the rear shock towers helps to counteract these forces. Adding the subframe to this connection further reduces lateral loads, eliminating side-to-side flex and enhancing overall stability.

Features & Design:

Four-Point Triangulated Structure: Links the rearmost subframe mounting locations to both rear strut towers for superior load distribution. Enhanced Stability: Reduces lateral and longitudinal RACP flex during acceleration, braking, and cornering. Improved Torque Transfer: Minimizes downward flex of the RACP, ensuring efficient power delivery for enhanced driveability. High-Performance Durability: Heavy-duty steel tube construction ensures lasting support during spirited driving, track use, and for vehicles with increased power output. Blue Powdercoat Finish: Offers fantastic corrosion resistance, protection from scuffs and scratches, and a stylish appearance that is sure to complement your performance-centric E46. Underside Reinforcement Compatibility: Designed to work seamlessly alongside our underside RACP reinforcement plates (TDR4675412, T#91). Kit Includes:

Rear Subframe Brace Sedan Subframe Brace Spacers Extended-Length Drill Bit (1/4", 12" Overall Length) High-Speed Drill Bit (12.5mm, 152mm Overall Length) Drill Bit Guide Extended Subframe Bolts Zinc-Plated Steel Hex Nut (2) Installation & Support:

Need installation tips? Our team has assembled a guided start-to-finish installation tutorial, including detailed instructions on drilling and cutting your trunk floor panel for perfect fitment. Click HERE for Installation Instructions

Modern BMW's are beginning to leave the performance derived handling and power delivery in the past as the demand for more comfort and features rises. The stiff suspension components designed around having the best driving experience from a luxury car has been left for the M models and replaced with soft rubber bushings and mounts. Unfortunately, this is a good move by BMW to support the masses.

The obvious approach was to offer products so the modern BMW can be upgraded into the car the enthusiast desires, superb handling, control, and a direct delivery of power to the rear wheels. When you upgrade to our Delrin subframe mounts you reconnect that power with almost zero negative feedback.

The added appeal to someone looking to take one of these machines on the race track is Delrin can be used when solid mounts are needed and aluminum is not an option with strict regulations found in Grand-Am, BMW CCA, and other racing series.

Product features:

• Precision machined Delrin(TM) 150 bushings.
• Precision machined 6061-T6 aluminum inserts. 
• Class legal for any racing class that does not allow a solid subframe bushing. 

Performance Benefits:

• Eliminates subframe movement for more direct throttle and suspension  response. 
• Minimizes wheel hop due to subframe deflection and movement. 

***Installation Instructions***

These GAC differential bushings/mounts fit the following BMWs: 
2014+ F22 BMW 228i 228iX M235i M235iX 
2012+ F30 BMW 320i 320iX 328i 328iX 335i 335iX - Sedan 
2014+ F34 BMW 328i 328iX 335iX - Gran Turismo 
2014+ F32 BMW 428i 428iX 435i 435iX - Coupe 
2014+ F33 BMW 428i 428iX 435i 435iX - Convertible
2014+ F36 BMW 428iX -Gran Coupe 

The Powerflex Heritage Rear Sway Bar Bushing (19mm) for BMW E24, E28, E36, E46, and Z4 provides a modern suspension upgrade while preserving the classic aesthetics of older BMW models. This bushing is part of the Heritage Collection, offering a perfect blend of vintage style and enhanced performance, ideal for enthusiasts who want to maintain the originality of their vehicle while improving handling.

Key Features:

• Material: Made from durable polyurethane, which is far more resistant to wear, heat, and road contaminants than OEM rubber. It provides a longer-lasting solution for suspension upgrades.

• Heritage Look: Designed to maintain a classic appearance, the bushings are a subtle gray-green color, giving a nod to the original factory look of vintage BMW models while delivering modern performance benefits.

• Fitment: Specifically designed for 19mm rear sway bars, ensuring a perfect fit for the rear sway bars of BMW E24, E28, E36, E46, and Z4 models.

• Performance Enhancement: The polyurethane material provides a firmer connection between the sway bar and the chassis, significantly reducing body roll and improving cornering stability, leading to better handling and a more connected driving feel.

• Easy Installation: This bushing is a direct replacement for the factory rubber bushings, making it simple to install with no modifications required. It’s designed for seamless integration into your car’s suspension system.

Benefits:

• Improved Handling: Reduces excessive movement in the rear sway bar, providing sharper cornering, reduced body roll, and better overall vehicle control.

• Long-Lasting Performance: The high-quality polyurethane construction ensures extended durability compared to traditional rubber bushings, which wear out faster due to heat and road conditions.

• Classic Aesthetic: Keeps the vintage look of your BMW while offering modern suspension performance, making it an ideal solution for classic car enthusiasts who want to retain the car's period-correct style.

The Powerflex Heritage Rear Sway Bar Bushing (19mm) is an excellent upgrade for BMW owners looking to enhance the suspension performance of their classic models without sacrificing the vehicle's original aesthetic. Perfect for those seeking improved handling and durability in both everyday and spirited driving.

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.

The Powerflex Rear Subframe Rear Mount Insert for the BMW E39 5 Series is specifically designed to enhance the performance and stability of the rear suspension system. By utilizing high-quality polyurethane, this insert significantly improves the rigidity of the rear subframe, offering a range of benefits for driving enthusiasts.

Key Benefits:

1. Enhanced Handling Performance: The insert reduces flex in the rear subframe mount, resulting in improved stability during cornering. This enhancement leads to better handling characteristics, allowing for more precise control and confidence when navigating turns.

2. Durability and Longevity: Constructed from resilient polyurethane, these inserts are designed to withstand harsh driving conditions and resist wear from oil, heat, and environmental factors. This durability ensures they maintain performance over a longer period compared to traditional rubber mounts.

3. Improved Road Feel: By minimizing unwanted movement in the subframe, these inserts provide enhanced feedback to the driver, allowing for a more connected and engaging driving experience. This is particularly beneficial for spirited driving and performance applications.

4. Straightforward Installation: Designed for a direct fit into the existing rear subframe mounts of the E39 5 Series, these inserts allow for easy installation without the need for modifications or extensive labor.

Ideal for BMW enthusiasts looking to upgrade their E39 5 Series's suspension system, these inserts deliver improved handling and responsiveness, making them suitable for both everyday driving and high-performance scenarios.