GiroDisc Porsche 991 GT3 Cup (992) Slotted Front Rotors
SKU: 64739440124

GiroDisc Porsche 991 GT3 Cup (992) Slotted Front Rotors

Sale price$769.95 Regular price$855.50
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Description

GiroDisc Porsche 991 GT3 Cup (992) Slotted Front RotorsSold priced in pairs Welcome to GiroDisc! Brake rotors have long been the overlooked link in performance car braking systems. Traditional 1 piece brake rotors are heavy and retain heat, diminishing their effectiveness and adding unsprung weight that adversely affects handling. When GiroDisc was founded in 2003, we made it our mission to design and manufacture 2 piece brake rotors that would perform flawlessly at the limits. Our fully floating design


Sold/priced in pairs


Welcome to GiroDisc!

Brake rotors have long been the overlooked link in performance car braking systems. Traditional 1-piece brake rotors are heavy and retain heat, diminishing their effectiveness and adding unsprung weight that adversely affects handling.

When GiroDisc was founded in 2003, we made it our mission to design and manufacture 2-piece brake rotors that would perform flawlessly at the limits. Our fully-floating design uses tension hardware to ensure that our rotors are silent on the street, but ready to go on the track.

By specializing in this area, we can dedicate our efforts to push our engineering and manufacturing to the highest levels in the industry. Customers around the world have found success maximizing the capabilities of their existing brake systems by installing GiroDisc rotors. This often negates the need for a pricier, more complex upgrade like a big brake kit.

GiroDisc is headquartered in Bellingham, Washington, where we design, engineer, manufacture and fulfill orders on site.


The primary purpose of the Girodisc system is to reduce unsprung and overall vehicle weight. The secondary purpose is to increase the ventilation and cooling capacity of the brake disc while retaining it's original dimensions. This is accomplished by using two-piece disc construction. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum.

The disc is made from cast iron, to the same specification and material as used by professional racing organizations. It is 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 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 grade 12 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring clips 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.


Important Questions Answered

Q: What is required to install the Girodisc system?

A: 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 and pads perfectly. Once the Girodisc system is in place, simply replace the cast iron rotor when needed. Some discs are larger in diameter and come with caliper spacers. If longer bolts are required, they are also supplied.

Q: How does reducing weight of the braking system benefit the vehicle?
A: The Girodisc will generally weigh between 4 8 lbs less than the oe disc it will replace. This is due to the heavy cast iron hat section being replaced with lightweight, high strength aluminum. The mass of any vehicle requires energy to accelerate or decelerate. Reducing the vehicle mass improves acceleration, and requires less energy to be dissipated during deceleration. Rotating mass requires additional energy in order to increase or decrease its speed of rotation. Decreasing the mass of the disc has a great benefit due to reduction in rotational inertia. This will allow more of the braking force to be available to decelerate the vehicle, not the disc.
Additionally, the mass of the brake system is also unsprung mass. Reducing the unsprung mass has the additional benefit of improved suspension performance, resulting in enhanced ride and handling. Rotating masses require additional energy to vary the plane on which they turn. The lighter the disc, the quicker the response of the vehicle steering due to the reduction in gyroscopic effect/rotational inertia of the disc. As an example, compare the weight of the Ferrari 360 OE disc at 18.2 lbs, and the Girodisc at 14 lbs. The Girodisc is 4.2 lbs lighter per disc. Replacing all four discs will save 16.8 lbs of rotating, unsprung mass.

Q: Why slotted discs?
A: The edges of the slots continuously clean and refresh the pad surface. This will allow the pads to have a maximized friction surface always available. Additionally, they prevent containments from collecting between the pad and disc interface.
The disc is lightened, decreasing its rotational inertia.
Slots prevent the formation of a water film on the disc in wet weather, maintaining the best brake response.

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 64739440124

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Cindy
Boise, US
★★★★★ 5
Easy access to the USB ports. Convient.
Color: Espresso, Number of Items: 2
Just what we wanted. Color, quality and size all good.
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Reviewed in the United States on April 24, 2026
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Wendy F.
Lexington, US
★★★★★ 5
Fantastic buy. Small and handy.
Color: White, Number of Items: 1
I bought this end table for a very small space. I also thought the USB and plug-in ports would be excellent as I have other end tables with that feature. I have a small USB-powered fan and USB desk lamp that I have plugged into the ports and they work fine. I LOVE this little table. The ports and plug-in are easy to reach, they might be more astectically pleaseing if they were rear mounted. The black plastic on the white table rather stands out so I wish they had white plastic, or again rear mounted. The drawer is very small but that is to be expected then the table is small as well. But it holds USB cords or a TV remote and whatever else that is small. The lower shelf could be used to display a plant or to set books on. I use it to hold my small trash can. The height is perfect for my accent chair or a normal-sized sofa. Overall I really do love this little table. Pay attention to assembly. The instructions were not very clear and I put the rails on in the wrong direction which meant disassembling the entire front to flip them around. It was easy to do but took a bit of time. It is a sturdy piece and I would buy it again if I needed another small table.
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Reviewed in the United States on August 10, 2023
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deb hemer
Cuba, US
★★★★★ 4
Easy
Color: Black, Number of Items: 2
Went together pretty easily
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Reviewed in the United States on May 23, 2026
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DOROTHY J.
Dallas, US
★★★★★ 5
Nice small end tables
Color: Espresso, Number of Items: 2
They are really nice. Perfect for my living room. Recommend if you have limited space. Also has a plug outlet and port to connect your phone charger and other devices which is very convenient.
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Reviewed in the United States on April 24, 2026
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RF
Bozeman, US
★★★★★ 5
Wow!
Color: Farmhouse White, Number of Items: 2
This comes as a two pack and I was thinking it might be cheap looking or be made of inferior materials. These end tables are solid and beautiful when put together. They come unassembled but the instructions are very clear and understandable. Highly recommend this product. Well worth the price.
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Reviewed in the United States on May 21, 2026

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