Zimmermann 150.3421.70 Formula Z Cross Drilled Brake Disc Two-Piece Floating Rotor

The Zimmermann 150.3421.70 Formula Z brake disc is a high-performance two-piece brake rotor engineered for demanding driving conditions. This premium rotor features a cross-drilled design with a floating aluminum hub that provides superior heat dissipation and braking performance under extreme thermal and mechanical loads.

Key Features:

• Two-piece floating brake disc design with aluminum hub for reduced unsprung weight
• Cross-drilled (perforated) rotor surface for optimal heat dissipation and gas evacuation
• Vented construction for enhanced cooling performance
• Coat Z anti-corrosion coating for extended service life and attractive appearance
• High-carbon alloy construction for superior strength and heat resistance
• Floating mount design allows radial expansion under heavy loads, preventing warping and heat cracks
• ECE certified for quality and performance assurance

The Formula Z line was developed to meet the increased demands of engine tuning and performance chassis setups. The floating mounting system enables radial expansion of the brake rotor under heavy loads, preventing brake shield contact and significantly increasing resistance to thermal cracking. The protective Coat Z coating provides corrosion resistance while maintaining an attractive finish. Replaces BMW OEM part number 34112282445.