Brembo 4KC.9021AX Big Brake Kit GT Performance Brake Upgrade

The Brembo 4KC.9021AX is a complete Big Brake Kit (BBK) from Brembo's renowned GT performance brake line, engineered for drivers who demand superior stopping power, fade resistance, and race-derived braking precision. Brembo is the global benchmark in brake technology, supplying OEM systems to Formula 1, MotoGP, and the world's leading performance car manufacturers.

Key Features:

• 4-Piston Aluminum Caliper: Fixed-mount, rigid caliper design delivers consistent clamping force and outstanding pedal feel under repeated heavy braking
• 2-Piece Floating Rotor: Two-piece disc assembly floats in both radial and axial directions, reducing unsprung weight and minimizing warping from thermal expansion
• High-Performance Brake Pads: Included pads use advanced friction compounds optimized for both street and track driving conditions
• Steel-Braided Brake Lines: DOT/TUV-compliant metal-braided hoses provide firm, consistent pedal response and resist expansion under pressure
• Complete Hardware Kit: Includes all necessary brackets, mounting adaptors, fasteners, and installation hardware for a straightforward upgrade
• Corrosion-Resistant Finish: Caliper features a durable protective coating for long-term reliability and visual appeal
• Motorsport-Derived Engineering: Engineered venting system improves cooling capacity and increases resistance to thermal shock cracking

Brembo GT Big Brake Kits are designed for performance enthusiasts seeking a significant upgrade over OEM braking systems, delivering improved stopping distances, reduced brake fade, and a more responsive pedal. Each kit is a complete corner solution that installs using the included hardware and adapter brackets.