D1-078 Girodisc Alfa Romeo 4C Front Replacement Rings
Upgrade your Alfa Romeo 4C’s stopping power with Girodisc D1-078 305mm front replacement rings. Designed as direct replacements for Girodisc’s two-piece rotor systems, these precision-machined rings bolt onto your existing Girodisc aluminum hats using the supplied floating hardware kit. Each ring is made from Girodisc’s proprietary high-carbon cast iron for improved thermal control, consistent pedal feel, and fade-free braking under demanding conditions.
Vehicle Fitment
Compatible with:
• Alfa Romeo 4C (2015–2020)
• Fits Girodisc 305mm two-piece front rotor systems
Note: These rings are designed for Girodisc aluminum hats only. They are not compatible with OEM one-piece or carbon-ceramic rotors.
Features
• Sold as a left/right pair with complete floating hardware kit
• Direct replacements for Girodisc 305mm two-piece front rotors
• CNC-machined from high-carbon iron alloy for strength and consistent performance
• Directional curved vanes optimize cooling and reduce heat buildup
• Maintains OEM brake bias, ABS, and ESC calibration
• Lightweight two-piece design reduces unsprung weight
• Designed exclusively for Girodisc aluminum hats
Specifications
• Diameter: 305 mm
• Position: Front
• Material: High-carbon cast iron
• Mount type: Floating two-piece system
• Includes: Two rotor rings and hardware kit
• Sold/priced per pair
Girodisc D1-078 Alfa Romeo 4C Front Ring FAQs
Can these be used with factory Alfa Romeo rotors? No. These are designed only for Girodisc aluminum hats and cannot mount to OEM one-piece rotors or hardware.
Do these rotors improve braking over stock? Yes. The high-carbon alloy and floating design improve thermal stability, reduce fade, and enhance braking modulation during aggressive driving or track sessions.
What pad compounds are recommended? For street and light track use, Ferodo DS2500 or Hawk HPS 5.0 provide excellent control. For racing, Pagid RS29 or Endless ME20 deliver superior high-temp performance.
What torque should I use on the rotor bolts? Torque each fastener to 12 ft-lbs (16 Nm) using blue Loctite. Recheck after one full heat cycle to ensure proper float and hardware security.
Enhance your Alfa Romeo 4C’s agility and braking consistency with Girodisc D1-078 305mm front replacement rings — precision-built for lightweight performance, heat control, and lasting durability.
