Brembo G20 3-Series / G22 4-Series / A90 Supra / G29 Z4 GT-R Big Brake Kit - 380x28mm 2-Piece Rear
The Brembo GT-R Big Brake Kit for the BMW G20 330i and M340i, G22/G23 430i and M440i, Toyota GR Supra (A90), and BMW G29 Z4 is part of Brembo's GT|R range, pairing nickel-plated four-piston billet monobloc rear calipers with 380 × 28 mm two-piece brake discs. Positioned at the top of Brembo's GT range for track use, this complete rear-axle system is built for precise modulation, consistent pedal response, and effective heat management.
Billet Monobloc Caliper Design
Machined from billet aluminum, the calipers are formed as a single rigid monobloc structure and finished in durable nickel plating. A fixed, radial-mount four-piston layout with stainless steel piston inserts and recessed dust seals distributes pad pressure evenly while protecting the pistons from contamination, and a quick-release pad retainer simplifies pad service.
Two-Piece Ventilated Brake Discs
The 380 × 28 mm two-piece discs pair a high-carbon alloy friction ring with an internally ventilated, curved-vane design to manage heat during repeated braking. Floating D-bobbin mounting with anti-rattle springs allows the friction ring to expand independently of the disc bell, helping maintain consistent braking performance under demanding conditions.
Complete Rear Brake System
Supplied as a complete rear-axle upgrade, the kit includes calipers, pre-assembled brake discs, application-specific caliper adapters, stainless steel brake lines, brake pads, mounting hardware, and installation instructions. The calipers are finished in nickel plating, with drilled, Type 1 slotted, or Type 3 slotted (TY3 or TY3L) discs available. Race Technologies lists this rear system as not for road use, as it eliminates the factory parking/emergency brake function.
Product Details
- Rear four-piston nickel-plated billet monobloc calipers
- 380 × 28 mm (15") two-piece brake discs
- Complete rear-axle brake system
- Pre-assembled components
- Brake lines, pads, and installation hardware included
CALIPER
- Body: Billet Monobloc Radial Mount
- Piston Configuration: 4-Piston
- Piston Design And Insert Type: Inner Pressure Seal / Recessed Dust Boot / Stainless Steel Insert
DISC
- Type: Cross Drilled, Type 1 Slotted, or Type 3 Slotted (TY3 / TY3L)
- Material/Finish: Advanced High Carbon Alloy / Corrosion Resistant Plating
- Diameter: 380mm
- Width: 28mm
- Air Gap: 15.5mm
- Annulus: 54mm
- Construction: 2-Piece Disc Assembly
- Vane Design: Vented Curved 48 Vane
- Disc To Hat Mounting System: Floating D-Bobbin with Anti Rattle Spring
FRICTION MATERIAL
- Pad Compound: Brembo High Performance FM1000
- Pad Volume / Surface Area: 76.4 | 62.1
INCLUDED HARDWARE
- Brake Lines: Proprietary Brembo Stainless Steel Braided Brake Lines by Goodridge
- Mounting Hardware: Brembo Engineered CNC Billet Caliper Adapters - All Necessary Hardware Included For Ease of Installation
WHEEL FITMENT
- How to Measure Wheels for Required Clearance
- Brake Profile Cross Section
Please contact us for custom color options.
Images are for representational purposes only. Actual product may vary.