GiroDisc Rear Brake Rotors – Porsche GT4 Clubsport – 380x30mm

Description

GiroDisc Slotted Rear Brake Rotors – Porsche Cayman GT4 Clubsport

Upgrade or replace the rear brake rotors on your Porsche Cayman GT4 Clubsport with the GiroDisc A2-266 two-piece floating rotor system.

Designed as a direct replacement for compatible factory GT4 Clubsport rear brake assemblies, these 380 × 30mm rotors feature GiroDisc’s proprietary cast-iron friction rings, lightweight 6061-T6 aluminum center hats, and a floating mounting system developed for demanding competition use.

The complete assemblies are designed to work with the appropriate factory brake calipers without modification.

GiroDisc Part Number: A2-266
Rotor Size: 380mm × 30mm
Sold as a pair – left and right rear rotors

Designed for the Porsche GT4 Clubsport

The GiroDisc A2-266 is the complete rear rotor assembly for compatible Porsche Cayman GT4 Clubsport applications.

Although the 991 GT3 Cup and GT4 Clubsport use the same GiroDisc replacement friction rings, their complete rotor assemblies use different aluminum hats to accommodate the wheel mounting systems.

The 991 GT3 Cup uses centerlock wheels with larger wheel-drive pin openings, while the conventional GT4 Clubsport uses a five-lug wheel mounting arrangement.

For this reason, GiroDisc offers the A2-266 rear assembly for the GT4 Clubsport and the A2-238 for the 991 GT3 Cup.

Two-Piece Floating Rotor Construction

Each GiroDisc rear rotor combines a proprietary cast-iron friction ring with a lightweight 6061-T6 aluminum center hat.

High-strength alloy-steel drive pins transmit braking loads while allowing controlled axial and radial movement between the hat and friction ring.

This floating design accommodates thermal expansion during braking and allows the rotor to self-center between the brake pads.

Anti-noise spring washers help minimize the rattling commonly associated with floating rotor systems when cold.

Curved-Vane Internal Cooling

GiroDisc uses curved internal cooling vanes designed to move air through the rotor as it rotates.

The vane geometry acts as a centrifugal pump, promoting airflow through the friction ring to help manage brake temperatures during repeated heavy braking.

This construction is particularly valuable in racing applications where brake temperatures fluctuate significantly throughout a session.

Slotted Racing Friction Surface

The slotted friction surface is designed for performance and competition brake pads.

The slots help maintain a consistent friction interface under repeated braking loads and provide an alternative to drilled rotor designs.

Replace the Rings – Keep the Hats

The GiroDisc two-piece system is designed for long-term serviceability.

Once the friction rings reach their service limit, the existing GiroDisc aluminum hats can be retained if they remain serviceable.

The GiroDisc D2-238 rear replacement rings are available separately for compatible GT4 Clubsport GiroDisc assemblies.

This allows customers to replace the worn friction components without purchasing another complete rotor assembly.

Complete Rear Rotor Pair

This product includes:

• Left rear GiroDisc rotor assembly
• Right rear GiroDisc rotor assembly
• 380 × 30mm slotted cast-iron friction rings
• GiroDisc aluminum center hats
• Floating rotor mounting hardware

Sold and priced as a complete rear pair.

Specifications

• Manufacturer: GiroDisc
• Part Number: A2-266
• Application: Porsche Cayman GT4 Clubsport
• Axle: Rear
• Rotor Diameter: 380mm
• Rotor Thickness: 30mm
• Construction: Two-piece floating
• Friction Rings: GiroDisc cast iron
• Center Hats: 6061-T6 aluminum
• Friction Surface: Slotted
• Cooling: Curved internal vanes
• Replacement Rings: GiroDisc D2-238
• Quantity: Pair

Features

• Direct replacement for compatible Porsche GT4 Clubsport rear brake rotors
• 380mm × 30mm
• Two-piece floating rotor construction
• GiroDisc proprietary cast-iron friction rings
• Lightweight 6061-T6 aluminum center hats
• Curved-vane internal cooling
• High-strength floating drive-pin system
• Slotted racing friction surface
• Designed for competition use
• Works with compatible factory GT4 Clubsport rear brake calipers
• Replaceable friction rings
• D2-238 replacement rings available separately
• Sold as a complete left and right rear pair

Important Fitment Note

These are the GT4 Clubsport complete rear rotor assemblies, not the 991 GT3 Cup centerlock rotor assemblies.

Confirm the vehicle generation, wheel mounting configuration, and existing brake system before ordering. Contact Demon Speed Motorsports if you are unsure which rotor assembly is appropriate.