Girodisc GD355.32.52 355x32mm Replacement Rotor Rings (D52)
The Girodisc GD355.32.52 Replacement Rotor Rings (D52) are precision-built replacements for Girodisc two-piece rotor systems using the D52 configuration. Sized at 355mm x 32mm, these genuine Girodisc rings restore full braking performance while allowing you to reuse your existing aluminum hats and floating hardware, saving time and cost without compromising quality.
Precision Engineering for Long-Term Performance
Each Girodisc replacement ring is manufactured in-house in the USA from Girodisc’s proprietary cast iron alloy, designed to handle the extreme heat and stress of high-performance driving. The curved vane internal design acts as a centrifugal air pump, increasing airflow through the rotor to reduce operating temperatures and prevent fade. These rings are machined to exact tolerances and include a new hardware kit for a complete, bolt-on installation.
Features
• Dimensions: 355mm x 32mm (D52 configuration)
• Direct replacement for Girodisc two-piece D52 systems
• Reuses existing Girodisc aluminum hats
• Proprietary cast iron alloy poured and machined in the USA
• Curved vane internal geometry for efficient cooling
• Includes new hardware for installation
• Directional vanes for left and right rotors
• Sold/priced per pair
Vehicle Fitment
The Girodisc GD355.32.52 355x32mm Replacement Rotor Rings (D52) fit Girodisc D52-based two-piece systems used on:
• Porsche Cayman / Boxster (Girodisc 355mm D52 kits)
• BMW M2 / M3 / M4 (Girodisc 355mm D52 front or rear systems)
• Audi S4 / S5 (Girodisc 355mm D52 setups)
• Subaru WRX STI with Girodisc D52 355mm conversion
• Other high-performance applications using Girodisc D52 hat pattern
Always verify your hat pattern and rotor dimensions match the D52 specification before ordering.
Girodisc GD355.32.52 355x32mm Replacement Rotor Rings (D52) FAQs
What’s included in the kit? Two iron rotor rings (left and right) and a full set of new mounting hardware for reassembly.
Do I reuse my aluminum hats? Yes. These rings are designed to bolt directly to your existing Girodisc hats using the included hardware kit.
Are they compatible with OEM or other brands? No. Girodisc rings are engineered specifically for Girodisc aluminum hats and hardware.
Are the rotors directional? Yes. Each rotor features curved vane geometry for left and right installation, ensuring optimal airflow and cooling.
What material are they made from? Girodisc’s proprietary cast iron alloy provides high strength, excellent thermal stability, and consistent friction under extreme conditions.
Are they sold as a set? Yes. The Girodisc GD355.32.52 355x32mm Replacement Rotor Rings (D52) are sold and priced per pair, including all required hardware.
Restore factory-level braking performance and reliability with Girodisc GD355.32.52 Replacement Rotor Rings (D52)—precision-engineered in the USA for unmatched quality, cooling, and endurance.
