Brembo 203.9016A 2-Piece Floating Brake Rotor Disc Assembly 380x28mm

The Brembo 203.9016A is a high-performance 2-piece floating brake rotor disc assembly engineered for drivers who demand superior braking performance on both street and track. Measuring 380mm in diameter and 28mm in thickness, this rotor is built to the same exacting standards Brembo supplies to premier OEM manufacturers and motorsport programs worldwide.

Key Features:

• 2-Piece Floating Construction: The cast iron friction ring is joined to a lightweight aluminum hat via floating D-Bobbin hardware with an integrated anti-rattle spring, allowing the two components to expand and contract independently under extreme thermal cycles — preventing warping, cracking, and deformation
• 380mm x 28mm Disc Dimensions: Large-diameter swept area provides massive thermal capacity and consistent bite, ideal for high-performance street and track use
• Vented Curved 48-Vane Design: Optimized internal vane geometry accelerates airflow through the rotor for rapid and efficient heat dissipation
• Advanced High Carbon Alloy Iron: The friction ring is manufactured from advanced high carbon cast iron for superior fade resistance, improved bite, and extended service life
• Significant Weight Reduction: The aluminum hat design reduces corner weight by up to 15–30% compared to a conventional one-piece rotor of equivalent dimensions, improving handling, acceleration, and braking response
• Anti-Rattle Spring Hardware: Floating bobbin mounting system includes anti-rattle springs to eliminate noise associated with floating rotor assemblies — suitable for daily street use
• Direct OEM-Style Replacement: Designed to work with OEM-specification calipers and brake systems for seamless fitment and integration
• Corrosion Resistant Plating: Disc surfaces are treated with a corrosion-resistant finish to protect against rust and environmental degradation

Brembo's 2-piece rotor technology represents the pinnacle of aftermarket brake disc engineering — delivering race-proven thermal performance, reduced unsprung mass, and consistent stopping power. The 203.9016A is sold as a disc assembly set and ships pre-assembled with all necessary mounting hardware included.