Thumbnail for Two-piece Girodisc brake rotors with curved slots with black rotor hats and gold-colored hardware.

Thumbnail for Close-up image of a Girodisc 2-piece brake rotor viewed from the back

Two-piece Girodisc brake rotors with curved slots with black rotor hats and gold-colored hardware.

Close-up image of a Girodisc 2-piece brake rotor viewed from the back

A1-282 Girodisc 380mm Front Rotors

Price: $810.00

These Girodisc A1-282 2-piece front rotors are a direct bolt-on for the G87 M2, G80/G81 M3, and G82/G83 M4 without carbon ceramic brakes. Fully floating construction reduces unsprung/rotational mass while improving cooling, and they retain the factory calipers, ABS logic, and brake bias.

Vehicle Fitment

BMW G87 M2 (non-CCB) – Front
BMW G80/G81 M3 (non-CCB) – Front
BMW G82/G83 M4 (non-CCB) – Front

High-Carbon Rings, 72 Curved Vanes

The rotor rings are machined from high-carbon iron to Girodisc specifications. 72 curved vanes act as a centrifugal pump, drawing air through the hub for efficient heat rejection during repeated hard stops. The 2-piece design allows you to reuse the aluminum hats and refresh with D1-282 rings later.

Features

Direct OE replacement for 380 mm front rotors (non-CCB)
2-piece floating design reduces unsprung weight
High-carbon iron rings; reusable 6061-T6 aluminum hats
72 curved vanes for strong airflow and cooling
Assembled with cadmium-plated pins, spring clips, Belleville washers
Manufactured and assembled in Bellingham, WA
Sold/priced per pair

A1-282 FAQs

Minimum service thickness? Replace when rings reach 34 mm or sooner if a crack reaches the edge.

Do I need new calipers or brackets? No — bolts to factory hubs and works with OE calipers.

Which replacement rings match? D1-282 (380×34) front replacement rings.

Pad compatibility? Works with OE-shape pads and performance compounds; bed per pad manufacturer.

Related Products

Reviews

The Ultimate Auto Racing Helmet Buyer's Guide

We’ve sold tens of thousands of helmets here at Competition Motorsport and, in the process of doing that, answered a million questions (probably) about them. With that in mind, this article will give you the real lowdown on selecting a proper auto racing helmet. We’ll go over the why’s and how’s of size, shape, certification, pricing, features, and maintenance so you have the tools you need to select the perfect helmet.

Learn More

Add to cart

Driver Gear

If you wear it to protect yourself while racing, the Competition Motorsport Driver Gear collection is where you'll find it!

Shop Driver Gear

Add to cart

Racecar Gear

If you mount it on or install it in your vehicle for track days or wheel-to-wheel racing, the Competition Motorsport Racecar Gear collection is where you'll find it!

Shop Racecar Gear