Audi RS4 (2017-2025) B9 Girodisc 2 Piece Front Rotors

Girodisc High-Performance Brake Rotors – Direct OE Replacement

Upgrade your braking performance with Girodisc lightweight performance rotors, engineered as a direct replacement for factory discs. No modifications are needed—these rotors bolt directly onto your vehicle and work flawlessly with OEM brake calipers, preserving your factory brake bias and ABS system functionality.

Precision-Engineered Components for Maximum Performance

• Aircraft-Grade Aluminum Hat:
  The rotor hat is CNC-machined from U.S.-sourced 6061-T6 aluminum, meeting aerospace standards for strength and durability.

• Proprietary Cast Iron Disc:
  Designed and cast in the USA, the disc features Girodisc’s exclusive iron formula and curved vane internal cooling—a race-proven design that acts as a centrifugal pump to force air through the rotor and reduce brake fade under extreme conditions.

Floating Mount System for Durability and Noise Reduction

• Floating Two-Piece Design:
  Each rotor is mounted using 12 high-strength alloy steel pins, cadmium plated for long-lasting corrosion resistance.

• Anti-Rattle Engineering:
  Spring washers allow thermal expansion while eliminating unwanted noise, keeping the rotors centered between brake pads and quiet during daily driving.

• Secured with Class 12.9 Hardware:
  Heavy-duty cap screws and hardened washers provide long-term reliability under high loads and repeated braking cycles.

Cost-Effective, Long-Term Upgrade

Once installed, only the iron rotor ring needs replacement—the hat and hardware are reusable, making this a cost-efficient choice for performance-minded drivers.