D2 Front BBK VOLKSWAGEN TOUAREG 6.0 V12. 5 X 130 (05~10), 380x32mm, 6-pistons w/o dust covers. Racing Circuit-x

D2 Circuit-X – Front Racing Brake Kit for Extreme Performance

D2 Circuit-X is a high-performance front brake kit developed for professional motorsport, GT racing, endurance racing and demanding track use. Featuring CNC-machined high-strength 7075 aluminium calipers, thermally insulating titanium components, advanced brake cooling and extra-thick Brembo Racing pads, Circuit-X is engineered for maximum durability, low weight and consistent braking performance under extreme conditions.

Developed for Professional Motorsport and Endurance Racing

D2 Circuit-X is developed to meet the demands of professional motorsport, where the braking system must deliver consistent performance through repeated heavy braking and sustained thermal loads.

The brakes are subjected to very high loads, placing extreme demands on caliper rigidity, thermal management and brake pad characteristics.

Every detail is optimised for low weight, high rigidity, effective cooling and long service life. The combination of advanced materials and race-developed components creates a braking system engineered to perform under the most demanding circuit conditions.

Extra-Thick Brembo Racing RB340 Pads – Maximum Durability and Thermal Endurance

D2 Circuit-X comes with Brembo Racing RB340 brake pads measuring a substantial 25 mm thick at the front. These extra-thick pads are designed for extreme loads during sustained racing, where wear resistance, thermal stability and consistent braking performance are essential.

The generous pad thickness provides a substantial wear allowance and excellent thermal endurance, helping extend service life and reduce the need for pad changes under demanding racing conditions.

Benefits of Extra-Thick Racing Pads

• Long service life: A generous wear allowance enables longer intervals between pad changes.
• High thermal endurance: The greater material volume contributes to increased heat capacity and can help limit temperature rise at the brake pistons.
• Consistent braking performance: Race-developed friction material delivers stable braking performance even under heavy loads.
• Reduced risk of brake fade: The heat-resistant compound helps maintain friction at high temperatures.
• Less maintenance: Fewer pad changes can reduce running costs and time spent in the pits during endurance racing.
• Predictable braking control: Linear braking response and positive pedal feedback help the driver modulate braking force.

CNC-Machined High-Strength 7075 Aluminium Calipers

Circuit-X features advanced calipers precision CNC-machined from solid billets of high-strength 7075 aluminium.

This material combines high strength with low weight, making it particularly suitable for demanding motorsport applications.

The brake pistons are also manufactured from 7075 aluminium and feature titanium caps on the pad-facing side.

This construction offers several key advantages:

• High rigidity to limit caliper deflection under heavy loads.
• Low weight to help reduce unsprung mass.
• Improved wheel control and faster suspension response.
• High precision and consistent operation under extreme braking loads.

Titanium-Insulated Brake Pistons – An Effective Thermal Barrier

Circuit-X uses specially developed 7075 aluminium brake pistons with titanium caps facing the brake pads.

Titanium has significantly lower thermal conductivity than aluminium, creating a thermal barrier between the brake pad and piston.

This helps to:

• Limit heat transfer to the brake pistons.
• Reduce the thermal load on the brake fluid.
• Reduce the risk of brake fluid-related brake fade.
• Protect caliper seals and internal components from high temperatures.

This design is particularly valuable in endurance racing, where the braking system is exposed to high thermal loads for extended periods.

Advanced Brake Cooling with Carbon Fibre Air Ducts

D2 Circuit-X features specially developed carbon fibre air ducts that can be connected to external brake cooling hoses.

The ducts direct cooling air towards the calipers, helping control temperatures during repeated heavy braking.

Effective cooling is essential in motorsport and can contribute to:

• Lower operating temperatures in the braking system.
• Reduced risk of overheating.
• More consistent braking performance during long sessions.
• Reduced thermal loads on the brake pads and calipers.
• Improved durability during demanding track use.

Large Brake Discs – 380 and 400 mm

D2 Circuit-X front brake kits are available with 380 or 400 mm front discs, and 356 or 380 mm rear discs

The large discs provide substantial braking capacity and effective thermal management.

A larger effective braking radius also produces greater braking torque for the same clamping force and coefficient of friction.

The combination of large discs, rigid calipers and race-developed brake pads creates a high-capacity braking system with consistent performance.

Designed for Temperatures up to 800 °C

Circuit-X is engineered for extreme thermal conditions, with D2 specifying temperature resistance of up to 800 °C.

The combination of heat-resistant brake pads, titanium-insulated pistons and effective brake cooling helps the braking system maintain its function even under exceptionally demanding conditions.

Technical Specifications – D2 Circuit-X

• Motorsport / Racing / Track
• Calipers CNC-machined 7075 aluminium
• Brake pistons 7075 aluminium
• Piston caps titanium
• Brake pads Brembo Racing RB340
• Pad thickness 25 mm front and 26 mm rear
• Front brake discs 400 or 380 mm
  
• Rear brake discs 356 or 380 mm
• Temperature resistance Up to 800 °C
• Brake cooling with carbon fibre air ducts
• Construction: Weight-optimised for racing