GiroDisc two-piece floating front rotors for the BMW M2 / M3 / M4 (F8X), 400mm. A direct replacement for the OE disc that bolts straight on and works with the OE calipers, with no modifications necessary. Upgrading with lightweight high performance replacements rather than a big brake kit maintains the factory brake bias and ABS efficiency.
Key Features
- Hat made from strictly U.S. sourced 6061-T6 aircraft specification aluminium
- Disc cast in the USA from GiroDisc's proprietary cast iron and machined in house
- Curved vane design, developed in racing, acts as a centrifugal pump to force cooling air through the disc
- Floating mount with 12 alloy steel drive pins, cadmium plated, holds axial and radial float and lets the rotor self centre between the pads
- Anti-noise spring washers allow for heat expansion without rattle when cold; once fitted, only the cast iron rotor ring needs replacing
Specifications
- Outer diameter: 400mm
- Position: Front
- Construction: Two-piece floating
- Drive pins: 12 alloy steel, cadmium plated
- Cap screws: Class 12.9 with hardened washers
- Hat material: 6061-T6 aluminium
