Girodisc Ford S197 Mustang Front Replacement Rings
Refresh your Ford S197 Mustang’s braking system with Girodisc 355mm front replacement rings. Designed as direct replacements for existing Girodisc two-piece rotor assemblies, these rings restore braking precision and fade resistance for street, track, or autocross applications — all while reducing cost compared to a full rotor replacement.
Vehicle Fitment
Compatible with:
• Ford Mustang GT (2005–2014)
• Ford Mustang Boss 302 (2012–2013)
• Ford Shelby GT500 (2007–2014)
Note: These are friction rings only. They bolt directly to existing Girodisc aluminum hats using the supplied hardware kit.
Performance-Built Replacement Rings
Each Girodisc replacement ring is precision-cast and machined in the USA from a proprietary high-carbon iron alloy designed for exceptional strength and heat resistance. The 48 curved directional vanes act as a centrifugal air pump, drawing cooling air through the disc to minimize heat buildup and ensure consistent braking performance under heavy use. This design helps eliminate fade and vibration while providing smooth, repeatable braking lap after lap.
Features
• Direct-fit replacement for 355mm Girodisc two-piece front rotors
• Designed for Ford S197 Mustang GT, Boss 302, and GT500
• High-carbon cast iron for durability and crack resistance
• 48 curved directional vanes for improved cooling
• Machined, balanced, and finished in the USA
• Includes new floating hardware kit
• Sold/priced per pair
Specifications
• Diameter: 355mm
• Position: Front
• Material: High-carbon cast iron
• Includes: Two replacement rings and full hardware kit
• Made in the USA
• Sold/priced per pair
Girodisc D1-081 Replacement Ring FAQs
Do these fit OEM Mustang rotors? No. These are designed only for Girodisc two-piece rotor assemblies and will not fit stock Mustang brake systems.
Will these work with my existing Girodisc hats? Yes — these are designed to bolt directly to your Girodisc aluminum hats using the included hardware kit.
Are they suitable for track use? Absolutely. Girodisc rotors are engineered for endurance and track environments, offering stable braking performance under extreme heat.
Do I need special tools for installation? No special tools are required. Standard hand tools and a torque wrench are all that’s needed to swap the rings and reinstall the floating hardware.
Maintain your Mustang’s stopping power with Girodisc D1-081 355mm front replacement rings — built in the USA for strength, performance, and consistent braking you can trust.
