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NBS Master Cylinder Swap: Enhance Your Vehicle’s Braking Performance

When it comes to braking systems, the master cylinder plays a pivotal role in converting the pressure applied to the brake pedal into hydraulic pressure that activates the brakes. The NBS master cylinder refers to a newer generation of master cylinders that offer various improvements over the stock or older models. By swapping out the old master cylinder with a more recent NBS version, you can potentially enhance your vehicle’s braking performance and compatibility with upgraded brake systems.

Understanding the NBS Master Cylinder

The NBS master cylinder is designed with advancements in technology and engineering, offering improved functionality and performance compared to older models. It features enhanced sealing capabilities, more precise pressure modulation, and often a larger bore size, allowing for a greater volume of brake fluid to be displaced. These improvements result in a better brake pedal feel, increased responsiveness, and improved overall braking performance.

Reasons for Master Cylinder Swap

Improved Braking Performance

One of the primary reasons to consider an NBS master cylinder swap is the potential for improved braking performance. The upgraded design and engineering of the NBS master cylinder can enhance the overall efficiency and effectiveness of your vehicle’s braking system. With better sealing and pressure modulation, you can experience shorter stopping distances, increased pedal feedback, and a more confident braking experience.

Upgraded Brake System Compatibility

Another compelling reason to opt for a master cylinder swap is to ensure compatibility with upgraded brake systems. If you’ve modified your vehicle’s braking system, such as installing larger rotors or calipers, the stock master cylinder might not provide optimal performance. By swapping to an NBS master cylinder, you can ensure that your braking system is well-matched and can fully utilize the capabilities of the upgraded components.

Compatibility and Fitment Considerations

Before proceeding with a master cylinder swap, it’s crucial to consider compatibility and fitment aspects.

Vehicle Make and Model

The NBS master cylinder swap is typically vehicle-specific, so ensuring compatibility with your specific make and model is essential. Research and consult with experts or online communities dedicated to your vehicle’s enthusiasts to verify the suitability of an NBS master cylinder for your particular application.

Brake System Upgrades

If you’ve upgraded other brake system components, such as calipers, rotors, or brake lines, it’s important to choose an NBS master cylinder that complements these modifications. Proper fitment and compatibility will ensure optimal performance and maximize the benefits of the master cylinder swap.

Choosing the Right Master Cylinder

When selecting an NBS master cylinder, several factors come into play.

Bore Size and Brake Pedal Feel

The bore size of the master cylinder influences the brake pedal feel and responsiveness. Larger bore sizes generally provide a firmer pedal feel, while smaller ones can offer a softer and more progressive pedal feel. Consider your preference and driving style when choosing the appropriate bore size for your NBS master cylinder swap.

Dual Master Cylinder Conversion Kits

In some cases, especially for older vehicles not equipped with a dual master cylinder setup, it might be advisable to explore dual master cylinder conversion kits. These kits allow separate hydraulic circuits for the front and rear brakes, enhancing safety and control by providing redundancy in case of a brake system failure.

Installation Process

Now that you’ve selected the right NBS master cylinder for your vehicle, it’s time to install it. Here’s a step-by-step guide to help you through the process.

Gather Necessary Tools and Supplies

Before installing, ensure you have all the tools and supplies readily available. These typically include wrenches, pliers, a brake bleeder kit, a drip tray, fresh brake fluid, and a service manual or online guides for your vehicle.

Removing the Old Master Cylinder

To begin, locate the current master cylinder in your vehicle’s engine bay. Carefully disconnect the brake lines and any electrical connectors attached to the master cylinder. Remove the mounting bolts or nuts securing the master cylinder to the brake booster, and gently detach it from the vehicle.

Installing the NBS Master Cylinder

Once the old master cylinder is removed, it’s time to install the NBS master cylinder. Begin by positioning the new master cylinder on the brake booster and securing it with the provided mounting bolts or nuts. Reconnect the brake lines, ensuring a secure and leak-free connection. Follow the manufacturer’s instructions for torque specifications and proper installation.

Bleeding the Brake System

After the NBS master cylinder is installed, you need to bleed the brake system to remove any air trapped in the lines. Start by bleeding the furthest brake line from the master cylinder and gradually work your way to the closest line. Use a brake bleeder kit and follow the recommended bleeding procedure outlined in your vehicle’s service manual.

Testing and Fine-tuning

Once the installation and bleeding process is complete, testing and fine-tuning the brake system is essential.

Brake System Inspection

Inspect the brake system for leaks, loose connections, or abnormalities. Ensure all components are properly secured and torqued to the manufacturer’s specifications. If you notice any issues, address them promptly before proceeding.

Brake Performance Evaluation

Take your vehicle for a test drive and evaluate the braking performance. Pay attention to the pedal feel, responsiveness, and overall braking efficiency. Adjust the brake pedal height or free play to achieve optimal performance if necessary. Seek professional assistance if you encounter any persistent issues.

Benefits of NBS Master Cylinder Swap

Swapping your master cylinder for an NBS version benefits your vehicle’s braking system.

Enhanced Safety and Control

The improved design and performance of the NBS master cylinder enhance safety and control while driving. With more precise pressure modulation and improved sealing, you’ll experience better pedal feedback, increased confidence in braking, and a reduced risk of brake fade.

Increased Braking Efficiency

The NBS master cylinder’s larger bore size allows for a higher volume of brake fluid displacement, resulting in increased braking efficiency. This improvement translates into shorter stopping distances, improved heat dissipation, and consistent braking performance, especially in demanding driving conditions.


Upgrading your vehicle’s braking system through an NBS master cylinder swap can significantly enhance your driving experience. By improving braking performance, ensuring compatibility with upgraded brake components, and maximizing safety and control, the NBS master cylinder proves to be a valuable modification. Ensure proper fitment, follow the installation steps diligently, and fine-tune the brake system for optimal results.