Brembo 1J1.9030A1 GT Series Front Big Brake Kit 380x34mm 2-Piece Drilled Rotors

The Brembo 1J1.9030A1 is a complete GT Series Front Big Brake Kit engineered for drivers who demand maximum stopping performance on both the street and the track. Featuring oversized 380x34mm 2-piece cross-drilled rotors and high-rigidity aluminum calipers, this kit represents a significant upgrade over factory brake systems in both thermal capacity and braking force.

Key Features:

• High-Rigidity Aluminum Calipers: Monoblock cast aluminum construction for exceptional stiffness and minimal deformation under high-stress braking conditions
• 380x34mm 2-Piece Cross-Drilled Rotors: Oversized iron alloy discs with zinc coating for corrosion resistance; the 2-piece floating design allows controlled radial and axial float to prevent thermal distortion
• Cross-Drilled Disc Design: Improves heat dissipation and helps clear water, debris, and gases for consistent pad-to-rotor contact
• Twin Seal Caliper Design: Prevents dirt and debris from entering the caliper body and contaminating brake fluid
• High-Performance Brake Pads: Includes Brembo Sport / Ferodo FM1000 friction material pads, specifically formulated for high-performance applications
• TÜV/DOT Homologated Braided Stainless Steel Brake Lines: Metal-braided PTFE-lined hoses rated to 3,000 PSI for reduced flex and improved pedal feel
• Complete Hardware Kit: Pre-torqued aircraft-grade fasteners, mounting adapters, and all necessary installation hardware included
• Compatible with Factory ABS & Traction Control: Integrates with OEM electronic safety systems without modification
• Powder-Coated Calipers: Available in Black (A1 variant) for a bold, aggressive appearance behind the wheel

The Brembo GT Big Brake Kit is designed and tested for both spirited street driving and demanding track day sessions, delivering measurably shorter stopping distances and improved brake feel compared to stock systems. The kit ships as a complete front axle set with everything required for installation. Note: This kit is designed for vehicles at stock ride height; lifted or modified suspension may not be compatible with the included brake lines. Wheel clearance verification is strongly recommended prior to installation — 17-inch or larger wheels are typically required.

Brembo GT Big Brake Kits are backed by a 2-year warranty. All Brembo GT kits are custom-configured and non-returnable once ordered.