GiroDisc A2-154 Slotted 2-Piece Rear Brake Rotors for 2017-2021 Porsche 911 GT3

Vehicle Fitment

• 2017-2021 Porsche 911 GT3 (991.1/991.2) - 3.0L I6, 4.0L I6
• 2017-2021 Porsche 911 GT3RS (991.1/991.2) - 4.0L I6
• 2018-2021 Porsche 911 GT2RS (991.2) - 3.8L I6
• 2021 Porsche 718 Cayman GT4RS - 4.0L I6

Features

• Direct replacement for OEM Porsche PCCB rear rotors
• 2-piece floating design with slotted surface for improved heat dissipation
• 390mm diameter with staggered thickness: 32mm outer / 30mm inner
• Significantly lighter than stock PCCB rotors, reducing unsprung weight
• Maintains factory brake bias and ABS efficiency
• Compatible with OEM calipers and pads (requires GT3 iron rotor pad shape)
• Precision-machined for a perfect fit and easy installation
• Ideal for track enthusiasts seeking enhanced performance without upgrading to a full big brake kit

Specifications

• Material: High-carbon cast iron with cadmium-plated alloy steel hats
• Outer Diameter: 390mm
• Thickness: 32mm (outer) / 30mm (inner)
• Weight: Approximately 11 lbs per rotor (vs. 18 lbs for stock PCCB rotors)
• Mounting: 10 high-strength alloy steel drive pins for floating mount system
• Rotor Surface: Slotted
• Rotor Construction: 2-piece floating
• Sold as: Pair (left and right rear rotors)

Included Components

• 1x Left Rear Rotor
• 1x Right Rear Rotor
• All necessary hardware for installation

Product Description

The GiroDisc A2-154 2-piece slotted rear brake rotor kit is designed as a direct replacement for the OEM Porsche PCCB rear rotors on select 991 and 992 models. These high-performance rotors feature a 390mm diameter with staggered thickness, ensuring optimal braking performance and heat management. The slotted surface enhances pad bite and reduces brake fade, making them ideal for both street and track use.

Constructed from high-carbon cast iron with cadmium-plated alloy steel hats, these rotors are significantly lighter than the stock PCCB rotors, reducing unsprung weight and improving acceleration and suspension response. The 2-piece floating design maintains factory brake bias and ABS efficiency, providing a seamless integration with your vehicle's braking system.

Installation is straightforward, with no modifications required. The rotors are compatible with OEM calipers and pads, provided the GT3 iron rotor pad shape is used. This upgrade offers a cost-effective solution for enthusiasts looking to enhance their vehicle's braking performance without the need for a full big brake kit.