D1-091 Girodisc Ford S197 Mustang GT500 ('13–'14) Front Replacement Rings
Maintain your GT500’s braking dominance with Girodisc D1-091 380mm front replacement rings. These performance-engineered rotors are direct replacements for Girodisc’s two-piece systems, bolting to your existing aluminum hats using the supplied floating hardware kit. Each ring is precision-machined from Girodisc’s proprietary high-carbon cast iron for exceptional heat capacity, fade resistance, and consistent braking performance through repeated high-speed stops.
Vehicle Fitment
Compatible with:
• Ford Mustang Shelby GT500 (S197, 2013–2014)
• Compatible with factory Brembo 6-piston caliper setup (Girodisc system only)
Note: Designed exclusively for Girodisc 380mm two-piece front rotor systems. Not compatible with OEM one-piece or carbon-ceramic discs.
Features
• Sold as a left/right pair with complete floating hardware kit
• Direct replacements for Girodisc 380mm two-piece front rotors
• High-carbon iron construction for superior heat management and wear resistance
• Directional curved vanes promote efficient cooling and airflow
• Maintains OEM brake bias, ABS, and traction control calibration
• Precision-balanced to minimize vibration and optimize pedal feel
• Designed exclusively for Girodisc aluminum hats
Specifications
• Diameter: 380 mm
• Position: Front
• Material: High-carbon cast iron
• Mount type: Floating two-piece system
• Includes: Two rotor rings and full hardware kit
• Sold/priced per pair
Girodisc D1-091 Ford S197 Mustang GT500 ('13–'14) Front Replacement Ring FAQs
Can these rings mount to OEM GT500 rotor hats? No. The D1-091 rings are made for Girodisc aluminum hats and are not compatible with factory one-piece or aftermarket cast iron rotors.
What pad compounds pair best with these rotors? For street and occasional track use, Ferodo DS2500 or Hawk HPS 5.0 pads are ideal. For track-only setups, use Pagid RS29 or Carbotech XP12 for optimal bite and fade resistance.
Do these rotors reduce brake fade compared to OEM? Yes. The two-piece floating design and directional vane structure significantly reduce heat buildup and resist warping during heavy use.
What torque spec is required for the hardware bolts? Tighten all hardware to 12 ft-lbs (16 Nm) with blue Loctite applied. After one complete heat cycle, recheck torque to confirm proper float and safety.
Upgrade your GT500’s braking precision and endurance with Girodisc D1-091 380mm front replacement rings — engineered for high-heat performance, balance, and repeatable control at any speed.
