Brembo 01-06 M3 Rear GT BBK 4 Piston Cast 2pc 345x28 2pc Rotor Drilled-Black

The 345x28mm two-piece rotors in this Brembo GT Big Brake Kit are a key indicator of its performance focus. This rear kit is specifically built for the 2001-2006 BMW M3, offering a substantial upgrade over the factory braking components. The kit includes four-piston calipers, designed to provide more clamping force and better heat dissipation than stock, which is crucial for maintaining consistent braking performance during spirited driving or track use.

Brembo's GT BBK utilizes cast aluminum calipers, chosen for their strength and ability to manage heat without adding excessive weight. The two-piece rotor design, with a floating hat, allows for thermal expansion without inducing rotor stress or warping, further contributing to longevity and performance. The rotors themselves are drilled, which helps to vent gases and heat away from the pad surface, improving initial bite and reducing fade under heavy braking. This kit is a comprehensive solution for M3 owners looking to significantly enhance their vehicle's stopping capability and feel.

When installing this kit, you're replacing your entire rear brake assembly. It's a good idea to inspect your brake lines for any signs of wear or cracking, as upgrading to a higher-performance system often pairs well with stainless steel braided lines for a firmer pedal feel. Ensure you have the correct brake fluid for the job, as higher boiling point fluids are recommended for performance brake systems.