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Girodisc 2 Piece Rear Rotors Porsche 718 GT4 RS / 992 GT3 / GT3 RS

SKU: GIRA2-272
Price
$1,750.00
In Stock and Ready to Ship!

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Installation Services

Don’t worry about the hassle — let our expert team at Forza Motorworks handle the installation for you. Our professional installation ensures everything fits and operates exactly as intended, giving you clean, factory-quality results, proper wiring or mounting, and avoiding the risks of DIY mistakes. You’ll save time, avoid frustration, and get peace of mind knowing the job is done right the first time. Contact us to learn about our installation services and enjoy a seamless upgrade from day one.

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Forza Motor Works accepts returns for exchange, store credit, or refund within fourteen (14) calendar days of the delivery date, subject to the terms and conditions below. After fourteen (14) calendar days, all sales are final unless otherwise approved in writing by Forza Motor Works.

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Forza Motor Works
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FITMENT, INSTALLATION & PRODUCT USE

Customer is responsible for verifying vehicle compatibility, fitment, and intended use prior to installation. While Forza Motor Works makes reasonable efforts to provide accurate product information and fitment guidance, final responsibility for compatibility rests solely with the customer.

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Product Description

Upgrade the braking performance, thermal management, and durability of your Porsche 992 GT3 or 718 Cayman GT4 RS with the GiroDisc Two-Piece Rear Brake Rotor Set. Engineered for Porsche's high-performance GT platform, these premium brake rotors combine proprietary high-performance cast-iron friction rings with lightweight aluminum center hats to provide consistent braking performance during spirited driving and demanding track use.

The GiroDisc system is designed as a direct replacement for the original rear iron brake rotors, allowing owners to upgrade their braking components without replacing the factory calipers or modifying the original brake system. The result is a premium braking solution that preserves Porsche's original brake architecture while incorporating motorsport-inspired engineering.

Unlike conventional fixed brake rotors, the GiroDisc two-piece floating design separates the friction ring from the center mounting hat. This allows controlled movement between the components as braking temperatures increase, helping accommodate thermal expansion and reduce unnecessary stress during repeated high-temperature braking events.

The friction rings are manufactured using GiroDisc's proprietary cast-iron formulation, poured in the United States and precision-machined in-house. This construction provides a durable braking surface designed to withstand the elevated temperatures and repeated braking loads associated with performance driving.

To improve cooling efficiency, GiroDisc incorporates directional curved internal cooling vanes. Developed from motorsport applications, these vanes function as a centrifugal pump, moving cooling air through the center of the rotor and outward through the friction ring. Improved airflow supports more effective heat dissipation and helps maintain consistent braking characteristics under demanding conditions.

The center hats are manufactured from U.S.-sourced 6061-T6 aircraft-grade aluminum, offering a lightweight and durable mounting structure. This two-piece construction uses aluminum in place of iron for the center section, reducing unnecessary material mass while maintaining the strength required for high-performance braking.

A defining feature of the GiroDisc design is its fully floating mounting system, which uses 12 high-strength alloy-steel drive pins per rotor. These pins transfer braking forces between the friction ring and aluminum hat while permitting controlled axial and radial movement as temperatures change.

The drive pins are manufactured by GiroDisc in the United States and feature cadmium plating for corrosion resistance. They are secured using class 12.9 cap screws and hardened washers, providing a robust connection engineered for demanding braking applications.

To minimize the noise often associated with floating brake rotors, GiroDisc incorporates anti-noise spring washers on the rotor side of the mounting system. These components allow the rotor ring to expand as temperatures increase while helping prevent unwanted rattling when the brakes are cold.

The floating design also allows the rotor ring to self-center between the brake pads, promoting consistent contact and predictable braking behavior. The system works with the original Porsche rear brake calipers and unmodified factory brake pads on approved applications.

One of the most significant long-term advantages is the replaceable friction-ring design. Once the complete GiroDisc rotor assemblies are installed, worn friction rings can be replaced without purchasing new aluminum hats, provided the existing hats remain serviceable. This makes the system especially attractive for GT3 and GT4 RS owners who regularly participate in track events.

Designed and manufactured in Bellingham, Washington, GiroDisc brake rotors combine precision machining, premium materials, and proven floating-rotor technology to deliver a durable and serviceable braking upgrade.

For Porsche 992 GT3 and 718 GT4 RS owners seeking improved rotor construction, effective thermal management, and long-term serviceability while retaining factory brake components, the GiroDisc A2-272 Rear Rotor Set is an excellent upgrade for both performance street driving and track use.

Fitment Notes

  • Fits Porsche 911 GT3 (992 generation) equipped with compatible factory iron rear brakes

  • Fits Porsche 718 Cayman GT4 RS equipped with compatible factory iron rear brakes

  • Designed specifically for the rear axle

  • Direct replacement for compatible factory iron rear brake rotors

  • Two-piece floating rotor construction

  • Includes both left and right rear brake rotor assemblies

  • Retains factory Porsche rear brake calipers

  • Compatible with unmodified factory rear brake pads on approved applications

  • No aftermarket caliper brackets required

  • No cutting or welding required

  • Maintains the original brake system configuration

  • Not a direct replacement for factory PCCB carbon-ceramic rear rotors

  • PCCB-equipped vehicles require a separate, application-specific iron conversion

  • Professional brake installation recommended

  • Proper brake pad bedding and rotor break-in procedures must be followed

  • Always inspect brake pads, calipers, and mounting hardware before installation

Included

  • One (1) GiroDisc left rear two-piece brake rotor assembly

  • One (1) GiroDisc right rear two-piece brake rotor assembly

  • Two (2) proprietary cast-iron friction rings

  • Two (2) 6061-T6 aluminum center hats

  • Preassembled floating drive-pin hardware

  • Anti-noise spring washers

  • Required rotor-to-hat fasteners

Product Specs

  • Manufacturer: GiroDisc

  • Manufacturer Part Number: A2-272

  • Product Type: Two-Piece Floating Rear Brake Rotors

  • Vehicle Applications: Porsche 992 GT3 / 718 Cayman GT4 RS

  • Brake Configuration: Factory Iron Rear Brakes

  • Rotor Position: Rear

  • Quantity Included: 2 Complete Rotor Assemblies

  • Rotor Construction: Two-Piece Floating

  • Friction Ring Material: Proprietary Cast Iron

  • Friction Ring Casting: United States

  • Friction Ring Machining: GiroDisc In-House

  • Center Hat Material: 6061-T6 Aluminum

  • Center Hat Material Origin: United States

  • Internal Cooling: Directional Curved Vanes

  • Floating Hardware: 12 Drive Pins Per Rotor

  • Drive Pin Material: High-Strength Alloy Steel

  • Drive Pin Finish: Cadmium Plated

  • Fasteners: Class 12.9 Cap Screws

  • Fastener Washers: Hardened

  • Anti-Noise Hardware: Spring Washers

  • Axial Rotor Float: Yes

  • Radial Rotor Float: Yes

  • Self-Centering Rotor Design: Yes

  • Replacement Friction Rings: Available

  • Replacement Ring Part Number: D2-272

  • Aluminum Hats Reusable: Yes, Subject to Inspection

  • Factory Caliper Compatibility: Yes, on Approved Applications

  • Factory Brake Pad Compatibility: Yes, on Approved Applications

  • PCCB Direct Replacement: No

  • Installation: Direct Bolt-On

  • Manufacturing Location: Bellingham, Washington, USA

  • Sold As: Rear Axle Pair

Product Features

  • Two-piece floating rotor construction allows the cast-iron friction rings to expand independently of the aluminum center hats, helping manage thermal stress during aggressive braking.

  • Proprietary U.S.-cast iron friction rings provide durable braking surfaces designed for repeated high-temperature use on performance street and track-driven Porsche GT vehicles.

  • Directional curved internal cooling vanes improve airflow through the rotor, supporting efficient heat dissipation and consistent braking performance.

  • Lightweight 6061-T6 aluminum center hats provide a durable mounting structure while reducing unnecessary material mass compared with traditional all-iron rotor designs.

  • 12-pin floating hardware with anti-noise spring washers accommodates axial and radial movement, promotes rotor self-centering, and helps minimize unwanted cold-brake rattling.

  • Direct factory brake integration and replaceable friction rings retain the original Porsche calipers and pads while allowing future rotor-ring replacement without purchasing complete new assemblies.