Paragon 2-piece Rotors Front Pair 400mm x 36mm (15.75" x 1.42") - BMW M2 (F87) / M3 (F80) / M4 (F82/F83)
Paragon 2-piece Rotors Front Pair 400mm x 36mm (15.75" x 1.42") - BMW M2 (F87) / M3 (F80) / M4 (F82/F83) - Mil-Spec Black Hard Coat Anodizing is backordered and will ship as soon as it is back in stock.
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Paragon 400x36mm front two-piece rotors are supplied as a pair for BMW F87 M2 / F80 M3 / F82 M4. Match the installed brake package and rotor dimensions before choosing a hat finish.
Rotor specifications and fitment
| Vehicle application | BMW F87 M2 / F80 M3 / F82 M4 |
|---|---|
| Axle / quantity | Front / two rotor assemblies |
| Rotor diameter × thickness | 400x36mm |
| Required brake system | Manufacturer-listed red/silver 2NH calipers or gold carbon-ceramic calipers; confirm brake package and required pad shape |
| Rotor construction | Floating two-piece construction |
| Rotor ring material | CM-250 high-carbon alloy cast iron |
| Hat material | 6061-T6 aluminum |
| Rotor-to-hat mounting | D-Bobbin (Long) |
Design and serviceability
The iron friction ring and aluminum hat separate the rotor’s braking surface from its mounting section. CM-250 iron is heat treated and surface machined, while the aluminum hat provides a lightweight mounting structure. The slotted face helps maintain a clean pad contact surface during braking.
The floating ring-to-hat connection allows thermal expansion as brake temperatures rise. Directional internal vanes guide cooling air through the rotor; install each assembly on its specified side.
Brake-package requirements
Manufacturer-listed red/silver 2NH calipers or gold carbon-ceramic calipers; confirm brake package and required pad shape.
Hat finish and installation
Available hat finish: Mil-Spec Black Hard Coat Anodizing; Mil-Spec Hard Coat Anodizing. Paragon recommends the undyed hard-anodized finish for heavy track use because dyed black hats can discolor under high heat. Choose for your use case, then follow the Paragon general rotor installation and bedding guide (PDF).
What is included
Two assembled rotor units for the listed axle and access to the Paragon general rotor installation and bedding guide (PDF).
Product FAQs
Are these 400x36mm rotors for the front or rear?
This listing is for the front axle and includes two rotor assemblies for BMW F87 M2 / F80 M3 / F82 M4.
Which brake system do they fit?
Manufacturer-listed red/silver 2NH calipers or gold carbon-ceramic calipers; confirm brake package and required pad shape. Match the installed hardware, not just the vehicle model.
Is this a complete brake kit?
No. This listing supplies a rotor pair. Calipers and brake pads are not included.
Which hat finish suits track use?
Paragon recommends undyed hard anodizing for high-heat track use. Dyed black hardcoat hats can discolor at high temperatures; confirm the available finish in the selector.
For fitment help, send Pit Garage your model year, chassis, installed caliper/brake package and intended road or track use. For a big brake kit, include wheel specifications. Confirm current availability and lead time before planning installation.
Paragon 2-piece Rotors Front Pair 400mm x 36mm (15.75" x 1.42&...
