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

The Brembo GT-S Big Brake Kit for the BMW F85 X5M and F86 X6M represents a significant upgrade in rear braking performance, engineered for drivers who demand consistent braking balance under both street and track conditions. Designed with motorsport-derived technology, this system improves thermal stability, pedal consistency, and overall braking control during aggressive driving.

At the core of the GT-S system are Brembo’s 4-piston cast monobloc radial mount calipers paired with large 380x28mm 2-piece floating discs. This combination delivers improved rear braking balance, enhanced heat dissipation, and more precise modulation compared to the factory braking system. Whether on the road or under heavy braking conditions, the result is more consistent braking performance with reduced fade under repeated high-load use.

The high carbon alloy discs feature a corrosion-resistant finish and Brembo’s advanced floating D-bobbin mounting system with an anti-rattle spring. Combined with a curved vane internal ventilation design, the system is optimized to manage heat efficiently, maintaining braking performance and pedal consistency even in demanding environments.

Product Details

• Rear axle Brembo GT-S big brake kit
• 4-piston cast monobloc radial mount calipers
• 380x28mm 2-piece floating discs
• Advanced high carbon alloy discs with corrosion-resistant plating
• Floating D-bobbin 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
• Designed for street, track, and race applications

Vehicle Applications

• BMW F85 X5M
• BMW F86 X6M

Technical Overview

• Axle: Rear
• Caliper Type: Cast 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 D-Bobbin with Anti-Rattle Spring
• Pad Compound: Brembo High Performance
  

What’s Included

• (2) Brembo 4-piston 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