D1-021 Girodisc Ferrari 246, 308 BBK Front Replacement Rings
Restore confident braking in your classic Ferrari with Girodisc D1-021 front replacement rings, designed specifically for Ferrari 246 and 308 models equipped with Girodisc big brake kits (BBK). These rings replace worn components while retaining your existing aluminum hats, providing a cost-effective refresh without compromising performance or authenticity.
Vehicle Fitment
Compatible with:
• Ferrari 246 Dino (all models)
• Ferrari 308 GTB / GTS / GT4 (1975–1985)
Note: Designed for use with Girodisc 2-piece BBK front rotors only. Not compatible with OEM or other aftermarket hat assemblies.
Features
• Direct replacements for Girodisc BBK front rotors
• Sold as a left/right pair with complete hardware kit
• High-carbon iron rings for exceptional thermal stability
• Directional curved vanes for improved airflow and cooling
• Maintains OEM brake bias and pedal modulation
• Precision-machined in the USA and balanced for vibration-free operation
Specifications
• Diameter: 310–330 mm (application dependent)
• 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 D1-021 Ferrari 246 / 308 BBK Front Replacement Ring FAQs
Will these fit OEM Ferrari rotors? No. These are designed exclusively for Girodisc BBK two-piece systems using Girodisc aluminum hats.
Do these improve braking performance? Yes — the high-carbon alloy improves heat cycling and resistance to fade, while the curved vane design enhances cooling efficiency.
What pad compounds work best with these rotors? For street use, Ferodo DS2500 or Hawk HPS 5.0 pads are ideal. For track applications, Pagid RS29 or Carbotech XP10 provide excellent stopping power and durability.
When should I replace the rings again? Measure rotor thickness at every pad change. Replace when at minimum spec or if excessive heat cracking or scoring is visible.
Refresh the stopping performance of your Ferrari 246 or 308 with Girodisc D1-021 front replacement rings — precision-machined, track-proven, and engineered for classic Ferrari brake balance and feel.
