Brembo 1JD.9021A1 GT Series Big Brake Kit 6-Piston 380x34mm Black Caliper

The Brembo 1JD.9021A1 GT Series Big Brake Kit is a complete, high-performance front braking upgrade engineered for drivers who demand superior stopping power on both the street and the track. Part of Brembo's renowned GT Systems lineup, this kit delivers a significant performance advantage over factory braking systems through larger rotors, more sophisticated calipers, and precision-engineered components derived directly from motorsport.

At the heart of this kit are 6-piston cast aluminum fixed calipers finished in gloss black, paired with 380x34mm 2-piece iron discs mounted to a lightweight billet aluminum hat. This two-piece floating disc design reduces unsprung and rotating mass, improving both braking response and handling dynamics. The discs feature an exclusive directional venting system that improves cooling capacity and increases resistance to thermal shock-induced cracking by over 40% compared to conventional designs.

Key Features:

• 6-Piston Cast 2-Piece Fixed Calipers — Black anodized finish for aggressive, race-inspired aesthetics
• 380x34mm 2-Piece Iron Discs — Precision-drilled or slotted rotor surface for consistent pad sweep and heat dissipation
• Directional Venting System — Enhances cooling and reduces thermal cracking by over 40%
• Two-Piece Floating Disc Assembly — Cast iron disc mated to billet aluminum hat for reduced unsprung weight
• High-Performance Brake Pads Included — Specific friction compounds matched to the application
• TUV/DOT-Approved Stainless Steel Braided Brake Lines — Aircraft-quality hardware for maximum reliability
• Brembo-Engineered CNC Billet Caliper Adapters — All necessary mounting hardware included for straightforward installation
• Complete Axle Set, Pre-Assembled — Ready to install right out of the box

The Brembo GT system is designed for vehicles at their original ride height. Lifted or modified suspension may not be compatible with the included brake lines. This kit is built for drivers who want proven, race-developed braking technology in a streetable, DOT-compliant package — from daily commuting to high-performance track days.