Upgrade Your BMW's Braking Game

If you’re looking to step up your brake setup, the 034Motorsport 380mm x 28mm 2-Piece Floating Rear Brake Rotor Upgrade Kit is where it’s at for your BMW F8X M2 C/CS, M3/M4 C/CS, and M4 GTS. This isn’t just another rotor kit—it’s a complete replacement that works seamlessly with your factory rear calipers. Seriously, it’s like a match made in automotive heaven.

Weighing in at about 22.2 lbs, these rotors keep the weight in check while also managing heat like a pro. They’ve got this clever design with 72 directionally curved vanes that really push cool air through the rotor, helping to keep things from getting too toasty during those spirited drives or track days.

The central hat is made from 6061-T6 aircraft-grade aluminum, which is not just lightweight but also super durable. The rotor itself is crafted from a proprietary alloy that can handle some serious heat without losing its shape. So whether you’re hitting the streets hard or spending a long day at the track, you’ll be driving instead of wrenching on the car.

What I really dig about these rotors is the J-Slot design. Unlike traditional drilled rotors that can crack under pressure, these slots increase the braking surface area and help clear out contaminants. Plus, they manage to keep braking noise down, which is a nice touch. No one wants to sound like a freight train when coming to a stop.

And let’s talk about that 2-piece design. The rotor and hat float on high-strength alloy steel bobbins, allowing for some axial and radial movement. This means they can expand and contract safely with heat, which is a big deal for longevity. If you ever need to replace the rotor rings, it’s a lot cheaper than swapping out the whole setup.

Features:

• Lightweight at 22.2 lbs—same as OEM but with better metallurgy and thermal management.
• Floating, 2-piece design for better performance.
• Aerospace-grade aluminum hats that won’t let you down.
• CM-250 special alloy rotor rings for heat resistance.
• J-slotted friction face for improved braking efficiency.
• OEM fitment means you won’t have to fuss with modifications.
• 72 curved vanes for optimal cooling airflow.
• Floating bobbins for a smooth ride.
• Replaceable rotor rings save you money in the long run.
• Lower maintenance costs overall—win-win!

Fitment:

• BMW M2 Competition F87 S55 3.0L 2019-2021
• BMW M2 CS F87 S55 3.0L 2021
• BMW M3 F80 S55 3.0L 2015-2018
• BMW M3 CS F80 S55 3.0L 2017-2018
• BMW M4 F82 S55 3.0L 2015-2020
• BMW M4 GTS F82 S55 3.0L 2015-2020

Notes:

• If you’ve got the factory M-CCB Carbon Ceramic Brake Package (2NK) on your F8X M2 CS, M3/M4 Competition/CS, or M4 GTS, these rotors are a direct swap for those pricey carbon ceramic rotors. Talk about a smart upgrade!