EBC – SG2F020 - SG Grooved Two-Piece Floating Brake Discs (370mm) – REAR

EBC Racing SG Grooved two-piece floating rear brake discs represent the ultimate performance upgrade for BMW M high-performance models (F87 M2 / M2 Competition, F80 M3, F82 M4). Designed for high-stress circuit use, demanding track days and high-speed road driving, they deliver exceptional heat dissipation and significantly improve rear-axle braking balance.

Their two-piece construction combines an ultra-lightweight anodised aerospace-grade aluminium bell with a high-carbon cast-iron friction ring through a floating bobbin system. This design allows the friction ring to expand and contract freely during thermal peaks, preventing warping, heat cracking and pedal vibration. Curved slots (Curved Slotted / SG Groove) continuously clear pad-outgassing and friction dust, maintaining responsive bite. Directional internal curved vanes maximise channelled airflow and radically reduce operating temperatures.

Supplied as a complete, ready-to-fit pair (fully assembled rings and bells), they directly replace the original 370 mm rear discs while retaining perfect compatibility with the factory calipers.

Features

• Type: Two-piece floating rear brake discs (complete assembly)
• Slot design: SG Grooved (curved slots)
• Ventilation: Directional internal curved vanes
• Material: High-carbon cast iron with anodised aluminium bell
• Outer diameter: 370 mm
• Nominal thickness: 24.0 mm (minimum thickness: 22.0 mm)
• Complete kit: 2 brake discs (rear left and right)
• Floating construction: Free thermal expansion to prevent warping and vibration
• Reduced unsprung mass: Improves chassis response and suspension operation
• Superior heat dissipation: Ventilation vanes designed to maximise airflow
• Plug & Play installation: Direct replacement for the original 370 mm components with no modifications

Note

As these discs use directional curved ventilation, ensure that the correct rotation direction (right / left) is observed during installation.