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The E39 M5 is renowned for its performance and handling, but as with any high-performance vehicle, upgrades can enhance its capabilities even further. One of the most effective upgrades for the E39 M5 involves the installation of polyurethane bushings and rear subframe reinforcements. These modifications can significantly improve the car’s handling characteristics and overall driving experience.
Understanding Polyurethane Bushings
Polyurethane bushings are a popular upgrade for many performance vehicles, including the E39 M5. Unlike traditional rubber bushings, polyurethane offers several advantages that can contribute to improved handling.
- Durability: Polyurethane is more resistant to wear and tear compared to rubber, providing a longer lifespan.
- Performance: These bushings reduce flex and increase stability, which can enhance cornering performance.
- Precision: Polyurethane bushings offer a more direct connection between the suspension components and the chassis, improving feedback and control.
Benefits of Rear Subframe Reinforcements
The rear subframe of the E39 M5 plays a crucial role in the vehicle’s handling and stability. Over time, the subframe can flex under load, leading to a loss of precision and performance. Reinforcing the rear subframe can address these issues.
- Increased Rigidity: Reinforcements help to maintain the structural integrity of the rear subframe, preventing flex during aggressive driving.
- Improved Alignment: A stiffer subframe helps maintain better alignment of the rear suspension components, leading to more consistent handling.
- Enhanced Traction: With a more rigid rear end, the vehicle can transfer power to the ground more effectively, improving traction during acceleration.
Installation Process
Installing polyurethane bushings and reinforcing the rear subframe is a task that can be undertaken by experienced DIY enthusiasts or professionals. Here’s a basic overview of the installation process:
- Preparation: Gather necessary tools and parts, including polyurethane bushings, reinforcement plates, and appropriate fasteners.
- Remove the Rear Subframe: Safely lift the vehicle and remove the rear subframe from the chassis. This may involve disconnecting suspension components, exhaust systems, and brake lines.
- Replace Bushings: Remove old rubber bushings and install new polyurethane bushings in their place.
- Reinforce the Subframe: Attach reinforcement plates to the rear subframe as per the manufacturer’s instructions.
- Reinstall the Subframe: Carefully reinstall the rear subframe, ensuring all components are properly aligned and secured.
Considerations for Upgrading
While upgrading to polyurethane bushings and reinforcing the rear subframe can provide significant benefits, there are several considerations to keep in mind:
- Ride Quality: Polyurethane bushings may increase road noise and vibrations compared to rubber. Consider your preferences for comfort versus performance.
- Professional Installation: If you are not experienced with suspension work, consider hiring a professional to ensure proper installation.
- Alignment: After installation, a professional alignment is recommended to ensure optimal handling and tire wear.
Conclusion
Upgrading the E39 M5 with polyurethane bushings and rear subframe reinforcements can significantly enhance its handling characteristics. These modifications provide improved durability, performance, and stability, making the driving experience more engaging and enjoyable. Whether you are a track enthusiast or simply want to enhance your daily driving experience, these upgrades are worth considering.