Girodisc 328x28mm Replacement Rings (D54)
Need new rings for your Brembo or StopTech big brake kit? Girodisc has you covered. These 328x28mm replacement rings are 100% plug-and-play with your existing hats, offering factory-fit compatibility, superior cooling, and precise braking performance. Each kit includes new floating pin hardware, so installation is seamless and secure.
Vehicle Fitment
These replacement rings fit Girodisc, Brembo, and StopTech two-piece rotor systems utilizing 328x28mm discs. Ideal for performance and track-focused vehicles that need consistent braking performance and rebuildable rotor assemblies.
Note: These are friction rings only and install onto existing aluminum hats using the included hardware.
Precision-Built for Performance
The disc is made from Girodisc’s proprietary cast iron alloy, poured in the USA and machined in-house to exacting tolerances. Each rotor uses 48 curved directional vanes designed to function as a centrifugal pump, drawing air through the rotor to keep temperatures stable under high-stress braking. This engineering ensures exceptional fade resistance, consistent pedal feel, and extended rotor life — perfect for both street and circuit use.
Features
• Direct replacement for Girodisc, Brembo, and StopTech 328x28mm applications
• Includes new floating hardware kit (two sets)
• High-carbon iron alloy for strength and crack resistance
• 48 curved vanes for efficient heat evacuation
• Machined and balanced in the USA
• Bolt-on fitment with existing aluminum hats
• Sold/priced per pair
Specifications
• Application: 328x28mm two-piece rotor systems (D54)
• Material: Proprietary high-carbon cast iron
• Vane count: 48 curved directional
• Includes: Two rotor rings and two hardware kits
• Made in the USA
• Sold/priced per pair
Girodisc GD328.28.54 Replacement Ring FAQs
Will these fit my Brembo or StopTech big brake kit? Yes — these are designed to bolt directly to existing 328x28mm hats for both Brembo and StopTech systems using the D54 configuration.
Do the replacement rings include hardware? Yes. Each pair ships with two complete hardware kits for installation, including new floating pins, washers, and bolts.
Do I need to buy new hats? Not unless your existing hats are damaged. Girodisc rings are made to reuse your original hats for cost-effective rebuilds.
Can these be used for racing? Absolutely. Girodisc’s metallurgy and vane design are track-proven for endurance and sprint racing, providing stable, fade-resistant performance.
Rebuild your Brembo or StopTech big brake kit the right way with Girodisc GD328.28.54 328x28mm replacement rings — precision, performance, and value engineered for serious braking.
