Girodisc 2-piece front 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 |
|---|---|---|---|
| E90 / E92 / E93 M3, E82 1M | A1-157 – $1,250 | D1-157 – $780 | Direct bolt-on replacement, factory calipers. |
| E46 M3 & Z4M – 345 mm (ZCP / CSL, Porsche 996 or Mégane RS caliper swaps) | A1-012 – $1,150 | D1-012 – $680 | Replaces the 345 mm front rotors used on Competition Package and CSL cars; also sized for the common Porsche 996 Brembo and Renault Mégane RS caliper swaps. |
| E90 / E92 335i | A1-114 – $1,050 | D1-114 – $680 | Direct bolt-on replacement, factory calipers. |
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.