SKU: A2-049B
GiroDisc Porsche 981 Boxster Spyder 718 GTS 4.0 GT4 Slotted Rear Rotors
GiroDisc slotted rear rotors deliver track-proven braking for Porsche 981 Boxster Spyder and 718 Cayman GT4 Spyder GTS 4.0 models. This 2-piece design uses curved vanes to pump cooling air through the disc for consistent performance under heat. Sold in pairs with floating mount for noise-free operation and self-centering action.
Key Features
- 6061-T6 Aluminum Hat: U.S.-sourced aircraft-grade aluminum central hat reduces unsprung weight while resisting corrosion.
- Proprietary Cast Iron Disc: Poured and fully machined in the USA for exact tolerances and high-friction surface that resists warping.
- Curved Vane Design: Racing-developed vanes act as centrifugal pumps to force air through the disc brakes for rapid heat dissipation.
- Floating Mount System: 10 high-strength cadmium-plated alloy steel drive pins handle braking torque with axial and radial float for smooth operation.
- Anti-Noise Spring Washers: Secure pins eliminate cold rattle allow thermal expansion and ensure the rotor self-centers between pads.
Product Notes
- Sold and priced in pairs for left and right rear installation.
- Use 991 Carrera S 4S GTS rear pad shape for full rotor sweep contact.
- Box dimensions 15.3 x 14.7 x 6.8 inches shipping weight 43.5 lbs.
Installation Notes
- Professional installation recommended.
- Pair with 991 Carrera S 4S GTS rear pads for complete sweep pattern.
- Floating system uses class 12.9 cap screws and hardened washers included.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2016 | Porsche | Boxster | Spyder |
| 2016 | Porsche | Cayman | GT4 |
| 2019-2022 | Porsche | 718 Cayman | GT4 |
| 2020-2022 | Porsche | 718 Cayman | GTS 4.0 |
| 2019-2022 | Porsche | 718 Spyder | Base |
| 2020-2022 | Porsche | 718 Spyder | GTS 4.0 |
| 2022-2023 | Porsche | 718 Cayman | GT4 RS |
| 2023 | Porsche | 718 Spyder | RS |
Why Choose GiroDisc?
- Proven in racing with direct replacement simplicity for worn rotors.
- All components manufactured in USA from hat to pins for precise fit.
- Engineering focuses on cooling and float to maintain pad contact under load.
Frequently Asked Questions
-
Q: Which pads work best with these rotors?
A: 991 Carrera S 4S GTS rear pad shape ensures full sweep across the slotted surface for optimal bite and even wear. -
Q: What materials are used in construction?
A: Hat from 6061-T6 aircraft aluminum discs from proprietary USA cast iron pins cadmium-plated alloy steel all machined in-house. -
Q: How does the floating design benefit daily driving?
A: Pins with anti-noise springs prevent rattle when cold allow expansion when hot and self-center rotor for quiet consistent braking.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Secure box 15.3 x 14.7 x 6.8 inches
- Weight: 43.5 lbs
Brake Rotors
Shop aftermarket brake rotors from EBC Brakes, StopTech, Brembo, DBA, Hawk Performance, Centric, PowerStop, R1 Concepts, Baer, Wilwood, Girodisc, Rotora, and Black Ops Auto Works. Find drilled and slotted rotors, slotted rotors, dimpled rotors, blank OE-replacement rotors, two-piece floating rotors, high-carbon iron rotors, and vehicle-specific rotor packages for street, track, tow, and off-road applications. Match the rotor to the intended use before pairing with a friction level. Shop by vehicle year, make, model, trim, factory brake package, front or rear axle, and rotor style. Aftermarket brake rotors improve heat management, thermal capacity, and stopping consistency over factory rotors. Drilled and slotted rotors vent gas and dust from the pad-to-rotor interface, keeping the friction surface clean under repeated hard stops. Two-piece floating rotors reduce unsprung and rotating weight while allowing better thermal expansion. High-carbon iron rotors resist warping and crack...
View Brake Rotors Products
Brake Rotors - Slotted
Welcome to our exclusive Brake Rotors - Slotted collection, designed for performance enthusiasts who demand the best from their vehicles. Slotted brake rotors provide improved heat dissipation and better grip, ensuring that you can stop on a dime, even in the most challenging conditions. This collection features a wide variety of high-quality slotted brake rotors, perfect for enhancing your vehicle's braking performance. Why Choose Slotted Brake Rotors? Slotted brake rotors offer several advantages over traditional rotors, including: Enhanced Stopping Power: The slots on the surface of the rotors help to channel away dust and debris, providing a cleaner contact area for the brake pads. Improved Heat Management: Slotted designs allow for better airflow, reducing the risk of brake fade during intense driving situations. Durability: Our slotted brake rotors are crafted from premium materials, ensuring longevity and consistent performance. Shop with Confidence Each product in our...
View Brake Rotors - Slotted Products
Brakes
Shop aftermarket brake parts, pads, rotors, and big brake kits from Brembo, StopTech, Wilwood, EBC Brakes, Hawk Performance, Power Stop, DBA, Rotora, Goodridge, Russell Performance, Endless, Alcon, Performance Machine, BLOX Racing, PowerStop, and Black Ops Auto Works. Find brake pads, brake rotors, big brake kits, brake calipers, caliper covers, brake line kits, stainless steel brake lines, brake hardware, brake master cylinders, brake drums, brake shoes, hand brakes, and brake adapters for cars, trucks, SUVs, Jeeps, and track builds. Start with a matched pad-and-rotor pair or a complete big brake kit before adding stainless steel brake lines and high-temperature brake fluid. Shop by category, brand, vehicle year, make, model, and trim. Aftermarket brake systems improve stopping power, pedal feel, heat management, and fade resistance beyond what factory brakes provide. From performance brake pads and slotted or drilled rotors for daily-driver and street-performance use to big br...
View Brakes Products
GiroDisc
GiroDisc manufactures premium two-piece floating brake rotors designed for performance street and track applications where reduced unsprung weight, superior thermal management, and consistent pedal feel under repeated hard braking are required. The two-piece design separates the cast iron friction ring from the aluminum hat using a patented floater system that allows the rotor to expand thermally without transmitting warping stress to the hub, eliminating the judder and pedal pulsation that single-piece rotors develop after repeated track sessions. GiroDisc rotors are available for a wide range of European and Japanese sports cars including Porsche, BMW M, Ferrari, Lamborghini, and the Subaru WRX, targeting enthusiasts and racers who demand the same engineering quality in their brake hardware as in their suspension and engine components. The significant weight reduction compared to equivalent cast iron rotors improves both acceleration and braking response by reducing the rotational...
View GiroDisc Products
Porsche Parts & Accessories
Shop Porsche parts and accessories at Black Ops Auto Works for 911, Cayman, Boxster, Macan, Cayenne, Panamera, 718, 996, 997, 991, 992, 986, 987, 981, 982, 964, 993, 944 Turbo, GT3, GT3 RS, GT4, Turbo, Carrera, and performance Porsche builds. This collection includes exhaust systems, muffler bypass pipes, sport cats, downpipes, suspension upgrades, coilovers, sway bars, shocks, struts, brake pads, brake rotors, caliper rebuild kits, carbon fiber exterior parts, intake systems, air filters, cooling parts, wheel spacers, wheel bolts, drivetrain upgrades, engine parts, valve guides, fuel injectors, and Porsche styling accessories. Use this Porsche collection to find the right upgrade by model, chassis code, product category, brand, and driving goal. Exhaust and intake upgrades help improve sound and airflow, brake upgrades support stronger stopping power, suspension parts improve handling and ride control, carbon fiber parts add lightweight styling, cooling parts support demanding driv...
View Porsche Parts & Accessories Products


