Girodisc 2-piece rear rotors for every application in this range, in one listing. Choose your car in the Application drop-down, then choose Full rotors with hats (complete assemblies, ready to install) or Replacement rings only if you already run Girodisc hats.
Application guide
| Application | Full rotors (pair) | Rings only (pair) | Notes |
|---|---|---|---|
| 991 GT3 / GT3 RS – iron brakes | A2-146 – $1,750 | D2-146 – $1,030 | Direct replacement, factory unmodified pads, no modifications. |
| 991 GT3 / GT3 RS / GT2 RS with PCCB → iron conversion | A2-154 – $1,950 | D2-154 – $1,130 | Direct replacement iron rotor for the factory PCCB disc; factory calipers and pads. |
| 991 Turbo / Turbo S – 380 mm iron | A2-155 – $1,750 | D2-146 – $1,030 | Replaces the factory 380 mm rear rotors. |
| 991 Turbo / Turbo S, 991.2 Carrera & Carrera S / GTS with PCCB → 390 mm iron conversion | A2-156 – $1,950 | D2-154 – $1,130 | Direct replacement iron rotor for the factory PCCB rear disc. |
| 991.1 Carrera / C4 / S / 4S / GTS – 350 mm (direct fit) | A2-032 – $1,350 | D2-032 – $880 | Direct bolt-on 350 mm rear rotor. No modifications. |
| 991.1 / 991.2 Carrera, C4, T, S, 4S, GTS – upsized to 350 mm (spacers & bolts included) | A2-032B – $1,350 | D2-032 – $880 | Caliper spacers and longer bolts included. On base Carrera models use the Carrera S/4S/GTS rear pad shape so the pad sweeps the full rotor face. |
| 991 GT3 Cup – Girodisc hats (380x30) | A2-238 – $1,750 | D2-238 – $1,030 | Direct replacement for the factory 380x30 mm Cup discs. |
| 991 GT3 Cup – rings for factory PFC hats (380x30) | — | D2-370 – $1,030 (factory PFC hats) | Tooth-drive rings for the factory Porsche/PFC hats; reuse factory retaining hardware. Replaces PFC 380.30.0047.451/.461. |
| 991 GT2 RS Clubsport | A2-250 – $1,995 | D2-250 – $1,150 | Direct replacement for the factory rear discs. |
Correct fitment depends on the brake package your car left the factory with (rotor diameter, iron vs. PCCB / carbon-ceramic, caliper colour). If you are unsure, contact PHD Racing with your VIN before ordering and we will confirm the part number.
Girodisc 2-piece floating rotors
- Iron friction ring on a 6061-T6 aluminum hat – cuts unsprung and rotating weight vs. the one-piece factory disc.
- Curved, directional cooling vanes act as a centrifugal pump, pulling air through the disc under repeated hard stops.
- Pin-drive float system with anti-noise spring washers: the ring grows with heat and self-centers without the cold rattle of a race-style floating rotor.
- Rings cast from Girodisc's own high-carbon iron and machined in-house in Bellingham, WA; hats machined from US-sourced aluminum.
- Keeps the factory calipers, brake bias and ABS behaviour. Sold in pairs, directional (left/right).
- Serviceable: when the rings wear out, order the Replacement rings only variant and keep your Girodisc hats. Replacement rings fit Girodisc hats only.
Product photos are supplied by Girodisc and are representative of the product family; hat design and ring size vary by application.
