Upgrade the braking performance of your BMW G-Series M3 and M4 with our precision-engineered floating steel 2-piece brake rotors, designed to handle the power, weight, and driving intensity of BMW’s latest M platforms. Whether equipped with the standard steel brakes or driven aggressively on the street, these rotors deliver improved stopping power, superior thermal control, and long-term durability over the factory setup.
Our rotors are manufactured using high-carbon steel disc rings, providing excellent thermal stability and consistent friction characteristics under repeated heavy braking. Each disc is mounted to a CNC-machined billet aluminum hat, reducing unsprung and rotational mass to improve steering response, suspension control, and overall vehicle dynamics—key advantages for the wide-track, high-grip G-Series chassis.
Unlike the factory quasi 2-piece design, our solution features a true floating 2-piece construction, allowing the rotor ring to expand independently under heat. This significantly reduces thermal stress, minimizes the risk of warping, and promotes even brake pad wear. The result is smoother pedal feel, more predictable braking behavior, and consistent performance across a wide range of driving conditions.
Designed as a direct bolt-on upgrade for the BMW G80 M3 and G82/G83 M4, these floating steel brake rotors retain OEM fitment while delivering a noticeable improvement in braking confidence and control—perfectly suited for performance-focused daily driving and spirited use.
Key Features
Direct fit for BMW G80 M3 & G82 / G83 M4
True floating 2-piece steel brake rotor design
High-carbon steel disc rings for fade-resistant braking
Billet aluminum hats to reduce unsprung weight
Improved heat dissipation and braking consistency
Even pad wear and predictable pedal modulation
OEM-caliper compatible, no modifications required
 
Front 380x30mm
Rear 370x24mm
 
Replace part #s 34108093709, 34108093710, 34208093729, 34208093730
 
Fitment: G80 BMW M3, G82/83 M4
                  
                 
 
Disc Material: G3500 High Carbon Steel
Hat Material: Billet Aluminum
 
Warranty: 1y/36000 mi (whichever comes first) against manufacturer defects.
 
Note: Several other machining patterns are available. Please contact us via email at info@tritonmotorsportsusa.com to discuss.
 
The price is for a set of  discs. Pads are not included.
 
Turn around time ~45 days
 
**For replacement rotor rings, please contact us via email.
 
**Noise reduction/anti vibration shims are highly recommended.
 
#Hardware pictured is optimized for weight. If you desire Bobbin style hardware for more space, please specify via email.
##Weight reduction dependent on OE construction and may not be as significant in all applications.