Brembo F85 X5M / F86 X6M GT-R Big Brake Kit - 380x28mm 2-Piece Rear

The Brembo GT-R Big Brake Kit for the BMW F85 X5M and F86 X6M represents the highest level of rear braking performance within Brembo’s Gran Turismo lineup, engineered for drivers who demand maximum braking stability under extreme street and track conditions. Designed with motorsport-derived technology, this system enhances rear brake balance, thermal stability, and pedal consistency during aggressive driving.

At the core of the GT-R system are Brembo’s 4-piston billet monobloc radial mount calipers paired with large 380x28mm 2-piece floating discs. This combination provides increased structural rigidity, improved heat dissipation, and more precise modulation compared to cast caliper systems. Whether on the road or under repeated high-load braking, the result is improved rear braking control with reduced fade in demanding environments.

The high carbon alloy discs feature a corrosion-resistant finish and Brembo’s advanced floating mounting system with an anti-rattle spring. Combined with a curved vane internal ventilation design, the system is optimized for maximum heat management, maintaining consistent braking performance even under sustained high-speed use.

Product Details

• Rear axle Brembo GT-R big brake kit
• 4-piston billet monobloc radial mount calipers
• 380x28mm 2-piece floating discs
• Available in Cross Drilled, Type 1 Slotted, and Type 3 Slotted disc configurations
• Advanced high carbon alloy discs with corrosion-resistant plating
• Floating disc-to-hat mounting system with anti-rattle spring
• Brembo High Performance brake pads
• Stainless steel braided brake lines included
• CNC billet caliper adapters included
• All required mounting hardware included
  

Vehicle Applications

• BMW F85 X5M
• BMW F86 X6M

Technical Overview

• Axle: Rear
• Caliper Type: Billet Monobloc Radial Mount
• Caliper Configuration: 4-Piston
• Disc Diameter: 380mm
• Disc Width: 28mm
• Disc Construction: 2-Piece Floating
• Disc Vane Design: Curved Vane Ventilation
• Disc Material: High Carbon Alloy
• Mounting System: Floating Mount with Anti-Rattle Spring
• Pad Compound: Brembo High Performance
• Application: Street, track, and race driving

What’s Included

• (2) Brembo 4-piston billet monobloc rear calipers
• (2) 380x28mm 2-piece rear discs
• Brembo high-performance brake pads
• Stainless steel braided brake lines
• CNC billet caliper mounting brackets
• All necessary installation hardware

Notes

• Wheel clearance must be verified prior to installation
• Professional installation is recommended
• Images are for representational purposes only, actual product may vary
• This item is not eligible for return once installed or test fitted
• How to measure wheel clearance
• Brake profile cross section