Wilwood XR Race-Only Brake Fluid

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.

• Not DOT approved and not intended for street use
• DOT4 viscosity and exceeds ERBP of DOT5
• Dry Boiling Point: 335°C/645°F
• Wet Boiling Point: 221°C/432°F
• 500mL/16.9oz Metal Can

Wilwood Engineering designs and manufactures high-performance disc brake systems and components. Their products are used in many forms of motorsports, from dirt circle track and off-road, to NASCAR and road racing. One of their core abilities is the rapid development of custom engineered brake systems using a combination of off-the-shelf and custom components. The Emotive Engineering Spec Corvette runs the series standard Wilwood AERO6 Big Brake Kit and I can testify to their dedication to motorsports and assembling precision-made, affordable brake products.

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.

Wilwood's XR Race-Only Brake Fluid is the same extreme high-temperature fluid used in F1, WRC, FIA WEC, and Moto GP. At 335°C/645°F, it features the highest dry boiling point of commercially available brake fluids. Wilwood touts this polyglycol-ether-based fluid as the lowest compressibility, lowest moisture affinity, and highest aeration resistance brake fluid. XR Race-Only has a wet boiling point of 221°C/432°F, but this fluid is not meant to be put in your daily driver. This is not DOT approved fluid and if brakes are bled regularly as you would during race preparations you will never come close to seeing the wet boiling point. Sold as 16.9oz in a metal can. That is a standard 500mL, folks. Please note this is a special order product, but usually ships in a few days directly from Wilwood.