Brembo 1A4.6003A3 GT 4-Piston Front Big Brake Kit 330mm Drilled Rotors

The Brembo GT 4-Piston Big Brake Kit is a complete bolt-on brake upgrade system designed specifically for 1987-1991 BMW E30 M3 models. This system features 330x28mm one-piece drilled and vented rotors paired with high-performance aluminum 4-piston fixed calipers finished in silver.

Complete System Includes:

• 4-piston fixed aluminum calipers with silver finish
• 330mm diameter x 28mm thick one-piece drilled and vented brake rotors
• High-performance brake pad set
• Stainless steel braided brake lines
• Aircraft-quality mounting brackets and hardware

Key Features:

• Direct bolt-on installation using factory suspension mounting points
• Fully compatible with stock brake master cylinder and ABS systems
• Cross-drilled holes feature bi-angle chamfering to reduce stress cracking under high-temperature operation
• Rotors treated with corrosion-resistant coating to prevent rust and enhance appearance
• Engineered for improved stopping power in daily driving and high-performance track applications

This front axle brake system delivers significantly improved braking performance over stock components while maintaining compatibility with factory systems. The larger rotor diameter and multi-piston caliper design provide superior heat dissipation and more consistent pedal feel during aggressive driving. Minor modification required for installation.

Important: Wheel clearance verification is critical before installation. Measure your wheels carefully to ensure proper fitment with the larger caliper and rotor assembly.