Girodisc 370mm Rear 2-Piece Floating Rotors for BMW G8X M2, M3 & M4 (A2-282)

Girodisc Rear 2-Piece Floating Brake Rotors – BMW G80 M3, G81 M3 Touring, G82/G83 M4 & G87 M2

Upgrade your BMW G8X's braking performance with the Girodisc A2-282 370mm Rear 2-Piece Floating Rotors. Designed as a direct replacement for factory rear iron brake discs, these premium rotors provide improved heat management, lower unsprung weight and outstanding braking consistency for enthusiastic road driving, track days and motorsport applications.

By retaining the factory rear calipers, brake balance and ABS calibration, Girodisc's lightweight two-piece rotor system delivers motorsport-inspired performance without compromising OEM drivability. Installation is a straightforward bolt-on upgrade with no modifications required.

Precision Engineered for Maximum Performance

Each Girodisc rotor features a precision CNC-machined 6061-T6 aircraft-grade aluminium centre hat paired with a proprietary high-carbon cast iron friction ring. Manufactured using premium materials and tight machining tolerances, the assembly delivers exceptional durability while reducing rotating mass compared to conventional one-piece brake discs.

The rotor incorporates 48 curved directional cooling vanes, engineered to maximise airflow through the braking surface. This centrifugal cooling design rapidly dissipates heat during repeated heavy braking, helping reduce brake fade while maintaining a consistent pedal feel.

Fully Floating Rotor Design

The Girodisc floating assembly allows the cast iron rotor ring to expand independently from the aluminium hat during extreme temperature changes.

Performance benefits include:

• Reduced thermal stress during aggressive braking
• Improved resistance to rotor distortion and cracking
• Consistent brake pedal feel under repeated heavy use
• Better rotor alignment within the caliper
• Improved braking confidence on road and track

To maintain excellent street manners, Girodisc uses precision floating hardware with anti-noise spring washers that minimise unwanted rotor movement while still allowing unrestricted thermal expansion when temperatures rise.

Lightweight & Serviceable Design

Unlike traditional one-piece brake discs, Girodisc's modular construction allows the cast iron friction rings to be replaced independently when worn while reusing the original aluminium hats.

This serviceable design offers several long-term advantages:

• Reduced brake servicing costs
• Lower replacement costs compared to complete rotor assemblies
• Reduced waste
• Retained lightweight performance
• Long-term value for performance enthusiasts

Replacement friction rings are available separately under Girodisc Part Number D2-282.

Features

• Genuine Girodisc A2-282 rear rotor kit
• 370mm x 24mm rear rotor size
• Direct bolt-on replacement for factory rear iron brake discs
• Designed for non-Carbon Ceramic Brake (CCB) vehicles
• Lightweight 6061-T6 aircraft-grade aluminium centre hats
• Proprietary high-carbon cast iron friction rings
• 48 curved directional cooling vanes
• Fully floating two-piece rotor construction
• Precision floating hardware with anti-noise spring washers
• Improved heat dissipation and fade resistance
• Reduced unsprung and rotating mass
• Replaceable friction rings for lower servicing costs
• Maintains factory brake balance and ABS performance
• Suitable for road, track day and motorsport use
• Sold as a pair

Vehicle Fitment

Compatible with BMW models equipped with factory iron rear brakes (non-CCB):

• BMW G80 M3
• BMW G80 M3 Competition
• BMW G80 M3 Competition xDrive
• BMW G81 M3 Touring
• BMW G82 M4
• BMW G82 M4 Competition
• BMW G82 M4 Competition xDrive
• BMW G83 M4 Convertible
• BMW G87 M2

Important: These rotors are designed for vehicles fitted with factory iron brake systems only and are not compatible with BMW Carbon Ceramic Brake (CCB) models. Please verify your vehicle's brake specification before ordering.

Why Choose Girodisc?

Girodisc has become one of the most respected names in performance braking, producing race-proven two-piece rotor systems trusted by enthusiasts, professional workshops and motorsport teams around the world. Their lightweight floating rotor technology improves cooling, reduces rotational mass and delivers exceptional durability while maintaining OEM fitment and factory braking characteristics.

Whether your G8X BMW is driven daily or regularly pushed on track, Girodisc rear rotors provide reliable, repeatable braking performance when it matters most.

Package Contents

• 2 × Girodisc 370mm Rear 2-Piece Floating Rotors
• CNC-machined aluminium centre hats (pre-assembled)
• Floating mounting hardware
• Ready for installation