Girodisc Subaru WRX STI ('18+) Rear Rotors
Upgrade your 2018+ Subaru WRX STI’s braking system with Girodisc’s precision-engineered two-piece rear rotors. Designed as a direct OEM replacement, these lightweight performance rotors improve cooling, reduce unsprung weight, and deliver consistent, fade-free braking on the street or at the track.
High-Performance Braking Without Compromise
The Girodisc system bolts directly to your factory calipers—no modifications required. The rotor hats are CNC-machined from U.S.-sourced 6061-T6 aluminum and paired with Girodisc’s proprietary cast iron rings for superior strength and heat dissipation. Their two-piece floating design allows the rotors to expand under heavy braking without distortion, ensuring smooth and consistent pedal feel even in the most demanding driving conditions.
Features
• Direct replacement for OEM 2018+ Subaru WRX STI rear rotors
• Lightweight two-piece construction with aluminum hats
• High-carbon cast iron rings poured and machined in the USA
• Floating mount system with cadmium-plated drive pins and anti-noise washers
• Curved directional vanes improve airflow and cooling
• Reduces rotational and unsprung mass for better handling
• Fully rebuildable—replace only the iron rings when worn
• Sold/priced per pair
Vehicle Fitment
Subaru WRX STI (2018–2021)
Fits all models equipped with factory Brembo rear calipers and 326mm rotors.
Girodisc A2-185 Rear Rotor FAQs:
Do these rotors fit earlier STI models? No. These rotors are designed specifically for the 2018+ STI with the updated Brembo brake package.
Are Girodisc rotors lighter than OEM? Yes. The two-piece design reduces weight per rotor, improving suspension response and braking performance.
Can I use OEM brake pads with these rotors? Yes. Girodisc rotors are fully compatible with factory or aftermarket pads designed for iron rotors.
Are they suitable for both street and track driving? Absolutely. Girodisc rotors deliver excellent street drivability with race-proven heat management and durability for track days.
Upgrade your WRX STI’s stopping power with Girodisc’s 2018+ rear rotors—engineered for lighter weight, better cooling, and consistent performance lap after lap.
