Girodisc 2-Piece Rotors for Subaru STi
Girodisc 2-piece rotors for the Subaru STi models are a direct replacement upgrade for your factory rotors. When you need to replace the rotor rings, they are available separately with new hardware and you can reuse the Girodisc hats.
These are sold as a pair, front or rear. The rotors are different between the model years, please read all options carefully. These do not fit WRX models. For STi only.
Purchase Includes:
(2) Rotors
Sold in pairs, front or rear
2004-2017 Weights:
• Single Girodisc Front Rotor: 16.5 pounds
• Single OEM Front Rotor: 20.5 pounds
• Single Girodisc Rear Rotor: 11 pounds
• Single OEM Rear Rotor: 18 pounds
Shipping Times:
Girodisc rotors typically ship in 1-2 weeks.
More from Girodisc:
The Girodisc system is a direct replacement for the OE disc. No modifications are necessary. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading your brakes with lightweight high performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. This reduction in rotational and unsprung weight allows for quicker acceleration and suspension response.
The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.
The rotor and hat have a floating mount system, which utilizes high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.
Once the Girodisc system is in place, simply replace the cast iron rotor when needed.
When used with performance pads and hi-temp fluid, you have what amounts to a truly amazing solution to overheating or warping rotors.
These are sold as a pair, front or rear. The rotors are different between the model years, please read all options carefully. These do not fit WRX models. For STi only.
| Rotors: | Fitment: | Part Number: |
| Front Pair | 2004-2017 STi | A1-007 |
| Front Pair | 2018-2021 STi | A1-185 |
| Rear Pair | 2004-2007 STi | A2-007 |
| Rear Pair | 2008-2017 STi | A2-095 |
| Rear Pair | 2018-2021 STi | A2-185 |
(2) Rotors
Sold in pairs, front or rear
2004-2017 Weights:
• Single Girodisc Front Rotor: 16.5 pounds
• Single OEM Front Rotor: 20.5 pounds
• Single Girodisc Rear Rotor: 11 pounds
• Single OEM Rear Rotor: 18 pounds
Shipping Times:
Girodisc rotors typically ship in 1-2 weeks.
More from Girodisc:
The Girodisc system is a direct replacement for the OE disc. No modifications are necessary. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading your brakes with lightweight high performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. This reduction in rotational and unsprung weight allows for quicker acceleration and suspension response.
The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.
The rotor and hat have a floating mount system, which utilizes high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.
Once the Girodisc system is in place, simply replace the cast iron rotor when needed.
When used with performance pads and hi-temp fluid, you have what amounts to a truly amazing solution to overheating or warping rotors.
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