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The Girodisc system is a direct replacement for the OE rear disc on the 981 GT4 with OEM iron rotors. No modifications are necessary, allows use of factory unmodified pads unlike most aftermarket solutions for this application. 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.
The central hat section of their rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from their 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 12 high strength alloy steel drive pins, manufactured by Girodisc in the USA to their 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.
If your car same with OEM center lock wheels please select the center lock drive pin option.
Sold/priced in pairs.
|Manufacturer Part #||A2-155|
|Weight||10.00 lbs (4.5 kg)|
|Height||2.5" (6.4 cm)|
|Width||8" (20.3 cm)|
|Length||8" (20.3 cm)|
|CARB compliant||Yes (see note below)|
Size and weight of different configurations may vary. For exact product weight and dimensions, please refer to the manufacturer's spec sheets or sizing sheets included in the description above or contact us.
CARB and EPA Emissions Statement: Based on the information provided to us by manufacturers and our own knowledge, we do the best we can to determine the CARB and emissions legality of the parts we sell. Please do your own research with the manufacturer to ensure that this part is legal for use in your state on the car you will be installing it on. If you believe that this part is incorrectly listed, please let us know at firstname.lastname@example.org. Parts which are not legal for use on emissions controlled vehicles in California will require an affidavit to be signed by the customer certifying the part's use on a vehicle which is not emissions controlled.