Brembo 4K3.8027AX GT Big Brake Kit Caliper Upgrade Kit - 4-Piston

The Brembo 4K3.8027AX is a complete GT Series Big Brake Kit from Brembo, one of the world's most trusted names in high-performance braking systems. Engineered for drivers who demand race-proven stopping power and fade resistance in demanding street and track environments, this kit delivers a significant upgrade over factory brake components.

Brembo's GT Big Brake Kits feature precision-engineered components designed to work as a complete, matched system — ensuring optimal thermal management, pedal feel, and braking consistency even under repeated hard stops. The kit is a direct bolt-on solution designed to fit within OEM wheel sizes, eliminating the need for spacers or custom fitment hardware in supported applications.

Key Features:

• Brembo GT Series high-performance big brake kit
• Precision-machined multi-piston caliper(s) for uniform pad clamping and improved modulation
• Slotted and/or drilled rotors for enhanced heat dissipation and bite
• Lightweight, high-strength caliper construction for reduced unsprung weight
• Consistent, fade-resistant braking performance for both street and track use
• Complete kit includes calipers, rotors, brake pads, and all necessary mounting hardware
• Direct bolt-on design for supported applications — no cutting or fabrication required
• Available in a range of caliper colors to complement vehicle aesthetics

Brembo's GT Big Brake Kits are developed using the same technology found in Brembo's OEM partnerships with leading sports car manufacturers and motorsport programs worldwide. The 4K3.8027AX is part number specific to a particular axle and caliper configuration — verify fitment using Brembo's official fitment guide before ordering.