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The E39 M5 is renowned for its performance, but to truly harness its capabilities, upgrading the brake system is essential. This article explores the journey from stock brakes to a Big Brake Kit (BBK), detailing the benefits and considerations for enthusiasts looking to enhance their vehicle’s stopping power.
Understanding the Stock Brake System
The stock brake system of the E39 M5 is designed to provide adequate stopping power for everyday driving. However, for those who push their vehicles to the limit, the limitations of the stock system become apparent. Key components include:
- Rotors: Standard size and material, sufficient for daily use.
- Pads: OEM pads provide decent performance but can fade under heavy use.
- Calipers: Single-piston calipers lack the clamping force needed for high-performance driving.
Identifying the Need for Upgrades
Upgrading the brake system is crucial for those who engage in track days, spirited driving, or simply want to improve their vehicle’s safety and performance. Signs that indicate the need for an upgrade include:
- Brake fade during high-speed or repeated braking.
- Increased stopping distances compared to initial performance.
- Overheating brakes after aggressive driving.
Benefits of Upgrading to a BBK
A Big Brake Kit (BBK) offers several advantages over the stock system, making it a popular choice among performance enthusiasts. Key benefits include:
- Improved stopping power: Larger rotors and calipers provide better clamping force.
- Heat dissipation: Enhanced cooling reduces the risk of brake fade.
- Better pedal feel: Upgraded components offer a more responsive braking experience.
- Customization options: BBKs come in various sizes and colors to match personal preferences.
Choosing the Right BBK for the E39 M5
When selecting a BBK for the E39 M5, several factors should be considered to ensure compatibility and performance. Key considerations include:
- Caliper size: Larger calipers provide more stopping power but may require wheel clearance adjustments.
- Rotor diameter: Ensure the rotors fit within the wheel and provide adequate cooling.
- Pad material: Select pads that suit your driving style, whether for street, track, or mixed use.
Installation Process
Installing a BBK on the E39 M5 can be a rewarding project, but it requires careful planning and execution. The installation process typically involves the following steps:
- Gather necessary tools: Ensure you have the right tools for the job, including a jack, jack stands, and wrenches.
- Remove the wheels: Safely lift the vehicle and remove the wheels to access the brake components.
- Remove stock components: Detach the stock calipers, rotors, and pads carefully.
- Install new BBK: Follow the manufacturer’s instructions to install the new calipers and rotors.
- Bleed the brakes: After installation, bleed the brake lines to remove any air bubbles.
- Reinstall wheels: Put the wheels back on and lower the vehicle.
- Test the brakes: Conduct a test drive to ensure everything is functioning correctly.
Maintenance Tips for Upgraded Brake Systems
Once you’ve upgraded to a BBK, proper maintenance is essential to ensure longevity and performance. Here are some tips to keep your brake system in top shape:
- Regular inspections: Check brake pads and rotors for wear and replace as needed.
- Keep components clean: Remove dust and debris to prevent corrosion and ensure optimal performance.
- Monitor fluid levels: Regularly check and replace brake fluid according to manufacturer recommendations.
Conclusion
Upgrading the brake system of the E39 M5 from stock to a Big Brake Kit can significantly enhance performance and safety. By understanding the benefits, selecting the right components, and following proper installation and maintenance procedures, enthusiasts can enjoy a more responsive and powerful driving experience.