SKU: 64739440124

GiroDisc Porsche 991 GT3 Cup (992) Slotted Front Rotors

Sale price$769.95 Regular price$855.50
Save 10%

Pay in installments of $213.88 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 25 - Jul 30

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 7 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
P
Verified Purchase
PCW
Charlottesville, US
★★★★★ 5
Tough
durable, heavy duty, takes a lot of abuse!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 15, 2025
T
Verified Purchase
Tom
Battle Creek, US
★★★★★ 2
Lasted one day
1yr old Sheltie destroyed it one day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2022
A
Verified Purchase
Adam Holden
Pawtucket, US
★★★★★ 1
Not for "chewers" or puppies.
The toy is not "ruff and tuff", at all. Puppy had it torn to bits in just a few minutes. Nothing like handing your dog the toy while you finish unloading groceries only to come back and it looks like it snowed stuffing in your living room. It's made of a very thin material and is quite flimsy. Won't be buying this brand again. Might be good for an older dog who just wants to carry it around or play fetch. Although it's so light and flimsy, throwing it any farther than a few yards probably wouldn't work...
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 3, 2019
M
Miz T
Draper, US
★★★★★ 5
Favorite Handy Toy
This snake has been around our house for years! My shitzu/maltease dog is tiny, and he has a small mouth, but I call him Diablo! He loves to growl and act like a horrible terror when it comes to fighting over a little squeaky toy, and we use the snake to try to "push" the little toy away from his mouth. He loves to bite the snake and pull on it viciously. The snake has tiny holes in it, but has pretty much stayed intact. I am getting ready to add more stuffing inside it so it won't be so floppy. years of use have flattened it out. I love this thing. Well worth the money for a small-mouthed dog. The squeaker in the head was fun while it lasted, but the beauty of this snake is its shape and versatility as a pull on, and sneak up behind toy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 5, 2019
C
Verified Purchase
Cindy Knox
Omaha, US
★★★★★ 5
Great toy
My dog absolutely loves this toy! Pretty durable, good for moderate to light aggression.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 29, 2025

recommand products