# Girodisc 350x28 Rear Brake Discs for Porsche 911 (991.1) Carrera and C4 (2008–2015) – 911 (991.1) Carrera S, 4S, and GTS (2011–2

> Pair of Girodisc rear discs, 350 × 28 mm, part no.: A2-032B. High-performance floating brake discs with aluminum hubs for the Porsche 911 (991.1) Carrera and C4 (2008–2015); Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015); Porsche 911 (991.2) Carrera, C4, and T (2015–2025); Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+); Porsche 911 (992.1) Carrera, C4, and T (2015–2025); Porsche 911 (996.2) GT3 (1999–2009).

- URL: https://www.gt2i.ch/en/brake-disk-for-bell/224478-girodisc-350x28-rear-brake-discs-for-porsche-911-9911-carrera-and-c4-20082015-911-9911-carrera-s-4s-and-gts-20112-3666618858036.html
- Reference: GIRO-A2-032B
- Price: CHF 1,637.06
- Brand: GIRODISC
- Availability: out of stock

## Description

The Girodisc A2-032B rear brake discs, measuring 350 × 28 mm, improve heat management during repeated braking on the Porsche 911 (991.1) Carrera and C4 (2008–2015), Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015), Porsche 911 (991.2) Carrera, C4, and T (2015–2025), Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+), Porsche 911 (992.1) Carrera, C4, and T (2015–2025), and Porsche 911 (996.2) GT3 (1999–2009). Their cast-iron tracks and aluminum cups form a floating assembly designed to manage thermal stresses and facilitate the replacement of tracks subjected to wear. Sold in pairs, with one left disc and one right disc.
These rotors are intended for the rear axle of compatible vehicles in the configuration listed below. They retain the compatible caliper mounting; any required spacers and brake pad specifications must be observed.
The curved internal cooling fins channel air through the rotor to dissipate heat during repeated braking. The floating mounting limits stresses caused by differences in thermal expansion 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-trimmed 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 discs or tracks. Their shape and compound must be compatible with the mounting, the cast iron, and the intended use; comply with the specific requirements for this part number and perform the prescribed break-in procedure.
Specifications for Girodisc A2-032B rotors for compatible vehicles
Brand: Girodisc
PartNumber: A2-032B
Position: rear
Sizes (diameter × thickness): 350 × 28 mm
Vehicles and models: Porsche 911 (991.1) Carrera and C4 (2008–2015); Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015); Porsche 911 (991.2) Carrera, C4, and T (2015–2025); Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+); Porsche 911 (992.1) Carrera, C4, and T (2015–2025); Porsche 911 (996.2) GT3 (1999–2009)
Braking surface: high-resistance cast steel
Packaging: Pair of complete rotors, one left and one right, with disc bells.
Housing: 6061-T6 aluminum
Construction: two-piece floating mounting design
Catalog part number: D2-032. Verify compatibility with the caliper generation before replacement.
Internal ventilation: directional curved fins
Minimum thickness: 26 mm
Overall height: 75 mm
Manufacturing of main components: United States
Vehicles compatible with Girodisc part number A2-032B
Porsche 911 (991.1) Carrera and C4 (2008–2015)
Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015)
Porsche 911 (991.2) Carrera, C4, and T (2015–2025)
Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+)
Porsche 911 (992.1) Carrera, C4, and T (2015–2025)
Porsche 911 (996.2) GT3 (1999–2009)
Porsche 911 (991.1) Carrera and C4 (2008–2015): 350 mm front disks/rear discs; S-version rear pads to cover the entire track.
Porsche 911 (991.1) Carrera and C4 (2008–2015): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (991.1) Carrera and C4 (2008–2015): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015): Mount 350/350 mm front/rear calipers with spacers and fasteners.
Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (991.2) Carrera, C4, and T (2015–2025): 350 mm front disks/rear discs; S-version rear pads to cover the entire track.
Porsche 911 (991.2) Carrera, C4, and T (2015–2025): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (991.2) Carrera, C4, and T (2015–2025): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+): Mount 350 mm rear pads with spacers and fasteners.
Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (992.1) Carrera, C4, and T (2015–2025): 350 mm front disks/rear discs; S-version rear pads to cover the entire track.
Porsche 911 (992.1) Carrera, C4, and T (2015–2025): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to provide full track coverage.
Porsche 911 (992.1) Carrera, C4, and T (2015–2025): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (996.2) GT3 (1999–2009): Mount the 350-mm rear caliper with spacers and fasteners.
Porsche 911 (996.2) GT3 (1999–2009): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (996.2) GT3 (1999–2009): Mounting using the supplied caliper spacers and the specified longer caliper bolts.
Each application is subject to its specific brake system, calipers, and any requirements for brake pads or spacers. Please verify these requirements before ordering.
Girodisc A2-032B Mounting Requirements
Porsche 911 (991.1) Carrera and C4 (2008–2015): 350 mm front disks/rear discs; S-version rear brake pads to cover the entire track.
Porsche 911 (991.1) Carrera and C4 (2008–2015): On base 991 Carrera models, use the rear brake pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (991.1) Carrera and C4 (2008–2015): Mounting using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015): Mount 350/350 mm front/rear calipers with spacers and fasteners.
Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (991.1) Carrera S, 4S, and GTS (2011–2015): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (991.2) Carrera, C4, and T (2015–2025): 350 mm front disks/rear discs; S-version rear pads to cover the entire track.
Porsche 911 (991.2) Carrera, C4, and T (2015–2025): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (991.2) Carrera, C4, and T (2015–2025): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+): Mount 350 mm rear pads with spacers and fasteners.
Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (991.2) Carrera S, 4S, and GTS (2002+): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (992.1) Carrera, C4, and T (2015–2025): 350 mm front disks/rear discs; S-version rear pads to cover the entire track.
Porsche 911 (992.1) Carrera, C4, and T (2015–2025): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to provide full track coverage.
Porsche 911 (992.1) Carrera, C4, and T (2015–2025): Mount using the supplied caliper spacers and the specified longer caliper bolts.
Porsche 911 (996.2) GT3 (1999–2009): Mount the 350-mm rear caliper with spacers and fasteners.
Porsche 911 (996.2) GT3 (1999–2009): On base 991 Carrera models, use the rear pad shape from the S, 4S, or GTS versions to cover the entire track.
Porsche 911 (996.2) GT3 (1999–2009): Mounting using the supplied caliper spacers and the specified longer caliper bolts.
Brake Pads and Braking Systems for Compatible Vehicles
Choose brake pads whose shape is compatible with the calipers and the A2-032B 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 flexible hoses and high-performance brake fluid that meets the vehicle’s specifications, along with proper bleeding and fluid replacement. This recommendation complements the mounting compatible with the original hydraulic system.
Maintenance of the Girodisc mounting on compatible vehicles
Replacing the pads alone helps keep the controlled rotors in good condition. Reusing a rotor 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 with each pad replacement.
FAQ — Girodisc A2-032B for compatible vehicles
What are the sizes of the A2-032B discs for my vehicle? The part number shown measures 350 × 28 mm and is mounted on the rear 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 intended use. On base-model 991 Carreras, use the rear brake pad shape from the S, 4S, or GTS versions to cover the entire brake surface. Perform mounting using the supplied caliper spacers and the specified longer caliper bolts.
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 A2-032B
350 × 28 mm size for rear 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 help reduce unsprung and rotating mass compared to a comparable one-piece cast iron disc.

## Features

- Product type: Brake disc on a Bol
- Diameter in mm: 350
- Position: Rear
- Thickness: 28