# Girodisc 410x36 Front Brake Discs for Porsche 911 (991.2) Carrera (2015+) with CCB - 911 (992) Carrera GTS (2019+) without CCB

> Pair of Girodisc front disks, 410 × 36 mm, part no.: A1-156. High-performance floating brake discs on an aluminum hub for the Porsche 911 (991.2) Carrera with CCB (2015+); Porsche 911 (992) Carrera GTS without CCB (2019+); Porsche 911 (992.1) Carrera S, 4S, and GTS with CCB (2015+); Porsche 911 (991) Turbo and Turbo S with CCB (2013–2019); Porsche 911 (992) Turbo without CCB (2019+); Porsche Cayman (981) GT4 with CCB (2015–2016); Porsche 718 (982) Cayman GT4 and Boxster Spyder with CCB (2019–2023).

- URL: https://www.gt2i.ch/en/brake-disk-for-bell/224568-girodisc-410x36-front-brake-discs-for-porsche-911-9912-carrera-2015-with-ccb-911-992-carrera-gts-2019-without-ccb-3666618858937.html
- Reference: GIRO-A1-156
- Price: CHF 2,364.75
- Brand: GIRODISC
- Availability: out of stock

## Description

Girodisc A1-156 front brake discs (410 × 36 mm) enhance braking endurance during sustained use on the Porsche 911 (991.2) Carrera with carbon-ceramic rotors (2015+), Porsche 911 (992) Carrera GTS (2019+), Porsche 911 (992.1) Carrera S, 4S, and GTS with carbon-ceramic rotors (2015+), Porsche 911 (991) Turbo and Turbo S with carbon-ceramic rotors (2013–2019), Porsche 911 (992) turbo (2019+), Porsche Cayman (981) GT4 with carbon-ceramic rotors (2015–2016), Porsche 718 (982) Cayman GT4, Boxster Spyder with carbon-ceramic rotors (2019–2023). Their cast iron tracks and aluminum bowls form a floating assembly designed to handle thermal stresses and facilitate the replacement of tracks subjected to wear. Sold in pairs, with one left-hand disc and one right-hand disc.
These rotors are intended for the front axle of compatible vehicles in the configuration listed below. They retain the compatible caliper mounting; any required spacers and brake pad specifications must be followed.
The curved internal cooling fins channel air through the rotor to dissipate heat during repeated braking. The floating mounting minimizes stresses caused by thermal expansion differences between the rotor and the housing and helps the rotor center itself between the brake pads, maintaining consistent contact under heat.
The hub is made of 6061-T6 aluminum. The high-strength steel drive pins are cadmium-plated to resist corrosion. They are secured by Class 12.9 bolts and hardened washers. Spring washers minimize cold-mounting noise while allowing the necessary compression for the floating mount.
New pads must be installed with new rotors or brake tracks. Their shape and compound must match the mounting, cast iron, and intended use; adhere to the specific requirements of this part number and perform the prescribed break-in procedure.
On compatible vehicles originally equipped with carbon-ceramic rotors, this pair provides a conversion solution to high-quality cast-iron rotors. It allows you to remove and store the expensive original carbon-ceramic rotors to preserve them during heavy-duty use, while reusing compatible calipers. Use new brake pads suitable for cast iron and adhere to the pad shapes and any spacers specified by the part number. Replaceable brake pads reduce the cost of replacing braking surfaces in heavy-duty use and offer a choice of linings to tailor bite and pedal reaction to the intended use.
Specifications for Girodisc A1-156 rotors for compatible vehicles
Brand: Girodisc
PartNumber: A1-156
Position: front
Sizes (diameter × thickness): 410 × 36 mm
Vehicles and models: Porsche 911 (991.2) Carrera with carbon-ceramic rotors (2015+); Porsche 911 (992) Carrera GTS (2019+); Porsche 911 (992.1) Carrera S, 4S, and GTS with carbon-ceramic rotors (2015+); Porsche 911 (991) Turbo and Turbo S with carbon-ceramic rotors (2013–2019); Porsche 911 (992) Turbo (2019+); Porsche Cayman (981) GT4 with carbon-ceramic rotors (2015–2016); Porsche 718 (982) Cayman GT4, Boxster Spyder with carbon-ceramic rotors (2019–2023)
Braking surface: high-resistance cast steel
Packaging: Pair of complete rotors, one left and one right, with disc bells.
Hub: 6061-T6 aluminum
Construction: two-piece floating mounting design
Catalog part number: D1-156. Verify compatibility with the caliper generation before replacement.
Internal ventilation: directional curved fins
Minimum thickness: 34 mm
Original rotor diameter: 410 mm
Manufacturing of main components: United States
Vehicles compatible with Girodisc part number A1-156
Porsche 911 (991.2) Carrera with carbon-ceramic rotors (2015+)
Porsche 911 (992) Carrera GTS (2019+)
Porsche 911 (992.1) Carrera S, 4S, and GTS with carbon-ceramic rotors (2015+)
Porsche 911 (991) Turbo and Turbo S with carbon-ceramic rotors (2013–2019)
Porsche 911 (992) turbo (2019+)
Porsche Cayman (981) GT4 with carbon-ceramic rotors (2015–2016)
Porsche 718 (982) Cayman GT4, Boxster Spyder with carbon-ceramic brake rotors (2019–2023)
Porsche 911 (991.2) Carrera with carbon-ceramic rotors (2015+): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche 911 (991.2) Carrera with carbon-ceramic rotors (2015+): Use the GT3/turbo (991/992) pad shape designed for cast-iron rotors, with reduced sweep height.
Porsche 911 (992) Carrera GTS (2019+): Without PCCB; use GT3 brake pads in the front with shape D1741.
Porsche 911 (992) Carrera GTS (2019+): Use the GT3/turbo (991/992) brake pad shape intended for cast-iron rotors, with reduced sweep height.
Porsche 911 (992.1) Carrera S, 4S, and GTS with carbon-ceramic rotors (2015+): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche 911 (992.1) Carrera S, 4S, and GTS with carbon-ceramic rotors (2015+): Use the GT3/turbo (991/992) pad shape intended for cast-iron rotors, with a reduced sweep height.
Porsche 911 (991) Turbo and Turbo S with carbon-ceramic rotors (2013–2019): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche 911 (991) Turbo and Turbo S with carbon-ceramic rotors (2013–2019): Use the GT3/Turbo (991/992) pad shape intended for cast-iron rotors, with reduced sweep height.
Porsche 911 (992) turbo (2019+): Without PCCB; use GT3 front brake pads with shape D1741.
Porsche 911 (992) Turbo (2019+): Use the GT3/Turbo (991/992) pad shape designed for cast-iron rotors with reduced sweep height.
Porsche Cayman (981) GT4 with carbon-ceramic rotors (2015–2016): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche Cayman (981) GT4 with carbon-ceramic rotors (2015–2016): Use the GT3/turbo (991/992) pad shape designed for cast-iron rotors with reduced sweep height.
Porsche 718 (982) Cayman GT4, Boxster Spyder with carbon-ceramic rotors (2019–2023): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche 718 (982) Cayman GT4, Boxster Spyder with carbon-ceramic rotors (2019–2023): Use the GT3/turbo (991/992) pad shape intended for cast-iron rotors, with reduced sweep height.
Each application is subject to its specific brake system configuration, calipers, and any requirements for brake pads or spacers. Please verify these conditions before ordering.
Girodisc A1-156 Mounting Requirements
Porsche 911 (991.2) Carrera with carbon-ceramic rotors (2015+): For factory PCCB; at the front, use the pad shape designed for cast-iron rotors.
Porsche 911 (991.2) Carrera with carbon-ceramic rotors (2015+): Use the GT3/turbo (991/992) pad shape designed for cast-iron rotors, with reduced sweep height.
Porsche 911 (992) Carrera GTS (2019+): Without PCCB; use GT3 brake pads in the front shape D1741.
Porsche 911 (992) Carrera GTS (2019+): Use the GT3/turbo (991/992) brake pad shape intended for cast-iron rotors, with reduced sweep height.
Porsche 911 (992.1) Carrera S, 4S, and GTS with carbon-ceramic rotors (2015+): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche 911 (992.1) Carrera S, 4S, and GTS with carbon-ceramic rotors (2015+): Use the GT3/turbo (991/992) pad shape intended for cast-iron rotors, with reduced sweep height.
Porsche 911 (991) Turbo and Turbo S with carbon-ceramic rotors (2013–2019): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche 911 (991) Turbo and Turbo S with carbon-ceramic rotors (2013–2019): Use the GT3/Turbo (991/992) pad shape intended for cast-iron rotors, with reduced sweep height.
Porsche 911 (992) turbo (2019+): Without PCCB; use GT3 front brake pads with shape D1741.
Porsche 911 (992) Turbo (2019+): Use the GT3/Turbo (991/992) pad shape designed for cast-iron rotors with reduced sweep height.
Porsche Cayman (981) GT4 with carbon-ceramic rotors (2015–2016): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche Cayman (981) GT4 with carbon-ceramic rotors (2015–2016): Use the GT3/turbo (991/992) pad shape designed for cast-iron rotors with reduced sweep height.
Porsche 718 (982) Cayman GT4, Boxster Spyder with carbon-ceramic rotors (2019–2023): For factory PCCB; at the front, use the pad shape for the cast-iron rotor version.
Porsche 718 (982) Cayman GT4, Boxster Spyder with carbon-ceramic rotors (2019–2023): Use the GT3/turbo (991/992) pad shape intended for cast-iron rotors, with reduced sweep height.
Brake Pads and Braking Systems for Compatible Vehicles
Choose brake pads whose shape is compatible with the calipers and the A1-156 track, and whose compound is suitable for sport driving or track use. The Endless, pagid Racing, or Ferodo Racing ranges may be considered after verifying the appropriate part number.
For intensive use, we recommend compatible aviation-grade hoses and high-performance brake fluid that meets the vehicle’s specifications, along with proper bleeding and fluid replacement. This recommendation complements the mounting, which is compatible with the original hydraulic system.
Maintenance of the Girodisc mounting on compatible vehicles
Replacing the pads alone helps keep the calipers in good condition. Reusing a caliper for up to three pad replacements is subject to inspection of its condition, its mounting components, and the mounting instructions; this number does not constitute a guaranteed service life. Use a new mounting component each time you replace the pads.
FAQ — Girodisc A1-156 for Compatible Vehicles
What are the sizes of the A1-156 discs for my vehicle? The part number shown measures 410 × 36 mm and is mounted on the front axle. The diameter alone is not sufficient: also check the brake system type and mounting requirements.
Is the product sold in pairs? Yes. It includes a left and a right disc for the same axle. Both discs come with their disc bells.
Do I need to replace the brake pads on my vehicle?Yes. Always install new brake pads with new rotors or new braking surfaces. Use a compound suitable for cast iron and your specific use. Use the GT3/Turbo (991/992) pad shape intended for cast iron rotors, with a reduced sweep height.
How do I identify the left and right sides? Girodisc rotors come with a label attached to each rotor: LEFT for the left side and RIGHT for the right side, as viewed from the direction of travel. On a left-hand-drive vehicle, “LEFT” corresponds to the driver’s side and “RIGHT” to the passenger side. Follow these labels and the instructions. On models with curved internal fins, the rolling direction depends on this internal ventilation; the surface grooves alone are not sufficient to determine the side.
How do I break in this mounting on my vehicle? Follow the Girodisc procedure and the brake pad manufacturer’s instructions to build up an even transfer ply. The PDF documents below detail installation and break-in.
PDF Documents for Mounting and Break-in
We have included two PDF documents below: an instruction manual for installing and breaking in the discs, and an instruction manual for installing new tracks on existing bowls. Consult the document that applies to your specific task before you begin.
Key Features of the Girodisc A1-156
410 × 36 mm size for front braking on compatible vehicles.
6061-T6 aluminum rotor and floating mount to manage thermal stresses.
Internal ventilation via curved fins to dissipate heat.
Replaceable pads to maintain a two-piece mounting.
Left/right pair identified for mounting.
Aluminum rotors to control the unsprung mass and rotating mass of the conversion kit.

## Features

- Product type: Brake disc on a Bol
- Diameter in mm: 410
- Position: Avant
- Thickness: 36