Girodisc Subaru WRX STI ('04–07) Rear Rotors
Upgrade your 2004–2007 Subaru WRX STI with Girodisc lightweight two-piece rear rotors engineered for precision, durability, and improved heat management. These rotors deliver faster response, reduced fade, and sharper braking feel while maintaining factory balance and ABS performance. Perfect for both daily driving and high-performance track use.
Vehicle Fitment
Compatible with:
• Subaru WRX STI (2004–2007)
• Subaru WRX STI Limited (2007)
Direct OEM replacement – bolts directly to factory hubs and calipers. Note: Minor pad modification may be required for proper clearance (see below).
Track-Tested, Street-Ready Braking Performance
The Girodisc system replaces the OEM one-piece rotors with a two-piece floating design to reduce unsprung mass and improve heat dissipation. Each rotor hat is CNC-machined from 6061-T6 aircraft-grade aluminum and hard-anodized for strength and corrosion resistance. The proprietary cast-iron rings are made and machined in the USA, featuring curved directional vanes that draw cooling air through the disc for maximum thermal efficiency. The result is consistent, fade-free braking performance under the most demanding conditions.
Features
• Direct OEM replacement for 2004–2007 Subaru WRX STI rear rotors
• Lightweight two-piece floating rotor assembly
• CNC-machined 6061-T6 aluminum hats with anodized finish
• Proprietary cast-iron friction rings with curved directional vanes
• Cadmium-plated drive pins resist corrosion and fatigue
• Anti-noise spring washers eliminate rattle and vibration
• Retains OEM parking brake compatibility
• Approximately 7 lbs lighter per rotor than stock
• Fully rebuildable – replace only iron rings when worn
• Sold/priced per pair
Installation Note
The OEM pads and some aftermarket brake pads require slight modification to fit the Girodisc hardware layout while maintaining OEM parking brake operation. This involves lightly grinding the backing plate of the pad to match the pad material arc. Girodisc includes instructions, and all pads purchased directly from Girodisc come pre-modified for a plug-and-play fit.
Girodisc A2-007 Rear Rotor FAQs:
Do these rotors fit directly on the 2004–2007 STI? Yes. The A2-007 rotors are designed specifically for the GD-chassis WRX STI and bolt directly to the factory hub and calipers.
Why is pad modification needed? Girodisc’s floating two-piece design changes the hardware arrangement slightly, requiring a small pad clearance adjustment to ensure proper fit and full parking brake functionality.
How much lighter are these than stock rotors? Approximately 7 lbs per corner—11 lbs each compared to roughly 18 lbs stock—reducing unsprung weight and improving handling response.
Are these suitable for aggressive driving or track use? Absolutely. The Girodisc design offers superior heat control, reduced fade, and consistent braking during sustained high-temperature operation.
Experience precise braking control and lasting performance with Girodisc rear rotors for your Subaru WRX STI—engineered for the driver who demands performance without compromise.
