What is the advantage of a two-piece floating rotor design?

A two-piece floating design allows the rotor ring to expand and contract independently of the hat due to heat. This reduces stress on the rotor, minimizing the risk of cracking and warping. The anti-rattle system also helps maintain a quieter operation.

Are these rotors compatible with my Porsche's factory brake pads?

These rotors are designed to work with the factory brake caliper mounting points. However, for optimal performance and to take full advantage of the rotor's capabilities, it is recommended to use performance brake pads designed for track or spirited driving, especially if your vehicle is used for such purposes.

What is the benefit of the slots on the rotor surface?

The slots are precisely machined to help sweep away brake dust and gases that build up between the rotor and the brake pad. This action helps maintain consistent friction and cooling, leading to more reliable and powerful braking, especially during repeated hard stops.

GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB) Slotted Front Rotors

Specifications

Brand: GiroDisc
Part #: A1-146
UPC: A1-146

GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB) Slotted Front Rotors

Name: GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB) Slotted Front Rotors
Brand: GiroDisc
SKU: girodisc-girodisc-porsche-911-gt3-gt3rs-gt2rs-991-excl-pccb-slotted-front-rotors-t14-563221
Price: 1904.00 USD
Availability: BackOrder

$1904.00

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Fits Porsche 911 GT3, GT3RS, and GT2RS (991 generation, excluding PCCB).
Fully floating two-piece rotor design with proprietary anti-rattle system.
Rotor rings are made from a heat-treated, high-carbon iron alloy.
Precisely machined slots help vent gases and dust for improved stopping power.
Designed to reduce the risk of rotor cracking under extreme heat.
Helps maintain consistent pedal feel during hard braking events.

These rotors are designed for the Porsche 911 GT3, GT3RS, and GT2RS models from the 991 generation, specifically excluding vehicles equipped with Porsche Ceramic Composite Brakes (PCCB).

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Product Details

GiroDisc is well-known for making high-performance brake components that stand up to serious track use. These front rotors, part number A1-146, are specifically made for the Porsche 911 GT3, GT3RS, and GT2RS models from the 991 generation, excluding those with the PCCB (Porsche Ceramic Composite Brakes) system. If you're pushing your 911 hard on the track or autocross course, you know how important consistent braking is, and these rotors are built to help you achieve that.

What sets these rotors apart is their construction and design. They feature a fully floating two-piece design, which is a big deal for high-performance applications. This design uses a proprietary anti-rattle system and allows the rotor to expand and contract freely with heat, reducing the risk of cracking and improving pedal feel under heavy braking. The rotor rings themselves are made from a high-carbon, iron alloy that's heat-treated for strength and durability, helping them resist warping even when they get extremely hot. The slots on the rotor face are precisely machined to help vent gases and dust away from the pad surface, which means more consistent stopping power lap after lap. This is a significant improvement over standard solid or drilled rotors when you're dealing with extreme temperatures.

When you're installing these, remember they are designed as a direct replacement for your stock front rotors, assuming your car doesn't have the PCCB ceramic brakes. You'll want to ensure you have appropriate brake pads that can handle the heat and work well with a slotted rotor surface. Many owners pair these with high-performance street or track pads to get the most out of the system. GiroDisc rotors are a solid choice for anyone looking to improve their Porsche's braking performance and reliability under demanding conditions.