Brembo 1B3.9003A3 Gran Turismo Big Brake Kit with Multi-Piston Calipers

The Brembo 1B3.9003A3 Gran Turismo (GT) Big Brake Kit represents the pinnacle of high-performance braking technology for street and track applications. This comprehensive brake upgrade system dramatically increases thermal capacity and brake torque through larger calipers and oversized disc rotors, delivering uncompromising stopping power and fade resistance under extreme conditions.

Two-Piece Rotor System Features:

• High-performance multi-piston calipers (2, 4, 6, or 8 pistons depending on application) with sequentially sized pistons for optimal pressure distribution
• Two-piece floating hat and rotor assemblies reduce unsprung and rotating weight while improving heat dissipation
• Drilled or slotted two-piece disc rotors available up to 16 inches (405mm) in diameter
• Caliper finish options in red, black, or silver
• DOT/TÜV approved stainless steel braided brake lines
• High-performance Brembo brake pads included
• Floating anti-rattle disc hardware for noise-free operation
• Precision-machined billet aluminum caliper mounting brackets

One-Piece Rotor System Features:

• Cost-effective performance upgrade with 2 or 4 piston calipers featuring sequentially sized pistons
• Drilled or slotted one-piece disc rotors up to 14 inches (355mm) in diameter
• Available in red, black, or silver caliper finishes
• DOT/TÜV approved stainless steel braided brake lines
• High-performance Brembo brake pads and billet caliper mounting brackets included

Complete Kit Includes: All necessary hardware for seamless installation. Fully compatible with ABS and traction control systems. Most GT applications include TÜV Certification for quality assurance.

Important: Proper wheel clearance measurement is critical for fitment. Verify your wheel specifications before installation to ensure adequate clearance for the larger caliper and rotor assembly.