Project Mu G-Four 335 Racing Brake Fluid

Project Mu G-Four 335 Racing Brake Fluid

Product information


Brake fluid is one of the most important, yet overlooked, components of your vehicle and critical to high performance driving. See our guide to choosing the right Track Day and Racing brake fluid for you.

  • DOT4 viscosity and exceeds ERBP of DOT5
  • Dry Boiling Point: 335°C/635°F
  • Wet Boiling Point: 221°C/430°F
  • 1L Metal Can

In mathematics, the greek letter mu (μ) represents the coefficient of friction. An example of being completely on brand, Japanese manufacturer Project Mu is known for making high-quality braking components for stopping modern performance vehicles. Founded in 1988, their signature teal components can be found on professional racecars across the globe.

Production battery EVs tout regenerative braking and "one pedal driving" as a prominent feature. Regenerative braking utilizes the vehicle's electric motor to slow the car down. While this is great for energy reuse and saving brake consumables, the factory fill brake fluid is not up to the task of spirited driving. Given the massive amount of friction necessary to slow down the weight of a modern EV, it is easy to overheat the OEM fluid leading to loss of pedal feel or, worse yet, serious brake failure.

Project Mu G-Four 335 Racing Brake Fluid gets its namesake features one of the highest dry boiling points on the market at 335°C/635°F and is one of the best value brake fluids at this performance level. G-Four 335 also features a unique green color. This aids in seeing air bubbles in the fluid and ensures you get a full flush as the fluid turns clear when it is ready to change and before it reaches its wet boiling point of 221°C/430°F. G-Four 335 is not meant to be mixed with other fluids and a full flush is recommended. Sold in a 1L metal can.


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