The most basic modification of the brake system is to replace it with high-performance brake fluid. When brake oil deteriorates due to high temperatures or absorbs moisture from the air, it can cause a decrease in the boiling point of brake oil. Boiling brake fluid can cause the brake pedal to become empty, which can suddenly occur during severe, frequent, and continuous use of the brakes. The boiling of brake oil is the biggest problem faced by the braking system. The brake must be replaced regularly, and the bottle should be sealed tightly when stored after opening to prevent moisture in the air from coming into contact with the brake oil. Some car models may limit the brand of brake fluid used because some brake fluids can corrode rubber products. It is necessary to refer to the warning in the user manual to avoid misuse, especially when using brake fluids containing silicone components. More importantly, do not mix different brake oils. For general road vehicles, brake fluid should be replaced at least once a year, while for racing cars, it should be replaced after every race.

Generally, brake systems have a section of soft rubber tubing used to support suspension activities. However, rubber itself is elastic and can deform when subjected to hydraulic pressure from the brake system, causing changes in the diameter of the tubing and reducing the transmission effect of brake oil hydraulic pressure, making it impossible for the brake cylinder to generate stable braking force. This situation will worsen the degree of deformation with the service life and severe operation of the brake system. The metal oil pipes that were originally used in aircraft hydraulic systems and can withstand high pressure and high temperature can improve this situation. The interior is made of Teflon material, and the outer layer is covered with a metal snake tube, which is not easily deformed and provides excellent hydraulic transmission effect. The hydraulic pressure transmitted from the brake master cylinder can be fully used to push the split piston, providing stable braking force. In addition, metal materials also have the characteristic of not being easily damaged, which can greatly reduce the probability of brake failure caused by oil pipe damage. The brake oil pipe is a necessary modification for racing cars, especially RALLY racing cars, and provides another safety guarantee for general road vehicles.