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 |
|---|---|---|---|
| F80 M3 / F82 M4 / F87 M2 – blue calipers (380 mm) | A1-186 – $1,350 | D1-186 – $880 | Direct bolt-on for cars with the standard blue calipers and iron rotors. |
| F80 M3 / F82 M4 / F87 M2 Competition & CS – red, silver or gold calipers (400 mm) | A1-220 – $1,450 | D1-220 – $980 | Direct bolt-on for cars with the 400 mm front brake (red, silver or gold calipers), including carbon-ceramic cars converting to iron – switch to an iron-rotor pad at the same time. |
| F8X with AP Racing / Essex 372 mm big brake kit | A1-194 – $1,450 | D1-194 – $880 | Replacement 372x36 mm rotors for the AP Racing / Essex kit, CP9660 and CP9668 versions. |
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.
