What makes this a racing brake fluid DOT4 rather than standard DOT4?

The MMX Super DOT4 formula is a highly refined glycol-borate ester blend rated at boiling points far above the minimum DOT4 standard — 312°C dry and 204°C wet, versus a standard DOT4 minimum of 230°C dry and 155°C wet. This puts its thermal performance on par with or above most DOT5.1 fluids, while remaining fully compatible with all DOT4 systems including ABS and DSC.

Can I use this racing brake fluid DOT4 on the road as well as the track?

Yes. Unlike some full race fluids that are highly hygroscopic and require frequent changes, the MMX Super DOT4 formula is engineered for both daily road use and track days without compromise. It can be left in the system for 1-2 years under normal street conditions.

Is this DOT4 fluid compatible with big brake kits?

Yes. The MMX Super DOT4 racing brake fluid is compatible with all DOT4 brake systems, from standard OEM calipers to aftermarket and MMX big brake kits. It is MMX's recommended first brake upgrade before changing pads or upgrading calipers.

How often should I change this brake fluid?

For street use, MMX recommends a full fluid change every 1-2 years. For track days and motorsport use, change the fluid more frequently — before each event or series of events — as track temperatures accelerate moisture absorption and reduce boiling performance over time.

Can I mix this with my existing DOT4 fluid?

Yes. Super DOT4 is glycol-based and fully miscible with standard DOT3, DOT4, and DOT5.1 fluids. For best performance, a complete fluid flush is recommended rather than topping up, to ensure the full thermal spec of the MMX fluid is present throughout the system.

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Description

MMX Super DOT4 Racing Brake Fluid (500ml)

Racing brake fluid DOT4 from MMX Performance is a Super DOT4 formula engineered for everything from daily street use to full motorsport applications, delivering a dry boiling point of 312°C (594°F) and a wet boiling point of 204°C (399°F), figures that significantly outperform most traditional DOT5.1 fluids without the downsides. Modern, highly refined Super DOT4 chemistry means this fluid handles extreme braking temperatures without fade, vapor lock, or the excessive hygroscopic absorption that makes some race fluids unsuitable for road use. Compatible with all DOT4 brake systems from standard OEM setups to MMX big brake kits it is the recommended first brake upgrade before any pad or caliper change. Developed and validated alongside MMX’s own Z4 GT race car and used in MMX’s track development program, the fluid is sealed in 500ml nitrogen-filled bottles to prevent moisture contamination before use. MMX recommends a full fluid change every 1-2 years for street use and more frequently for track environments.

Features

Super DOT4 formula; outperforms many traditional DOT5.1 fluids
Dry boiling point: 312°C (594°F)
Wet boiling point: 204°C (399°F)
Compatible with all DOT4 brake systems, OEM, and big brake kits
Resists brake fade under extreme track and motorsport conditions
Suitable for daily street use without compromise
Validated in MMX’s Z4 GT race car and track development program
Sealed 500ml bottles with nitrogen fill to prevent moisture contamination
Produced in the UK

Applications

Universal fit

Notes

Sold as a single 500ml bottle
Compatible with all DOT4 brake systems. Not for use in DOT5 (silicone-based) systems.
Change every 1-2 years for street use; more frequently for track and motorsport use

Frequently Asked Questions

What makes this a racing brake fluid DOT4 rather than standard DOT4? The MMX Super DOT4 formula is a highly refined glycol-borate ester blend rated at boiling points far above the minimum DOT4 standard — 312°C dry and 204°C wet, versus a standard DOT4 minimum of 230°C dry and 155°C wet. This puts its thermal performance on par with or above most DOT5.1 fluids, while remaining fully compatible with all DOT4 systems including ABS and DSC.
Can I use this racing brake fluid DOT4 on the road as well as the track? Yes. Unlike some full race fluids that are highly hygroscopic and require frequent changes, the MMX Super DOT4 formula is engineered for both daily road use and track days without compromise. It can be left in the system for 1-2 years under normal street conditions.
Is this DOT4 fluid compatible with big brake kits? Yes. The MMX Super DOT4 racing brake fluid is compatible with all DOT4 brake systems, from standard OEM calipers to aftermarket and MMX big brake kits. It is MMX’s recommended first brake upgrade before changing pads or upgrading calipers.
How often should I change this brake fluid? For street use, MMX recommends a full fluid change every 1-2 years. For track days and motorsport use, change the fluid more frequently — before each event or series of events as track temperatures accelerate moisture absorption and reduce boiling performance over time.
Can I mix this with my existing DOT4 fluid? Yes. Super DOT4 is glycol-based and fully miscible with standard DOT3, DOT4, and DOT5.1 fluids. For best performance, a complete fluid flush is recommended rather than topping up, to ensure the full thermal spec of the MMX fluid is present throughout the system.

About MMX Performance

MMX Performance is a UK-based specialist in performance parts for BMW and MINI vehicles, crafting high-quality upgrades that blend precision engineering, rigorous testing, and motorsport heritage. Driven by enthusiast culture, MMX designs its products in the UK and puts them through track validation to ensure durability, fitment accuracy, and on-road performance. Their catalog spans drivetrain components, spacers, hardware, and chassis enhancements, all tailored to elevate both the driving experience and visual appeal of BMW and MINI models.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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MMX Super DOT4 Racing Brake Fluid [MMR25-1501]

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MMX Super DOT4 Racing Brake Fluid (500ml)

Features

Applications

Notes

Frequently Asked Questions

About MMX Performance

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