D1-157 Girodisc BMW E9X M3 Front Replacement Rings

D1-157 Girodisc BMW E9X M3 Front Replacement Rings Restore the high-performance braking balance of your BMW M3 with Girodisc D1-157 380mm front replacement rings. These precision-machined components bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Each ring is made from Girodisc’s proprietary high-carbon cast iron, delivering exceptional cooling capacity, consistent pedal feedback, and fade-free performance under repeated heavy braking. Vehicle Fitment Compatible with: • BMW E90 M3 Sedan (2008–2011) • BMW E92 M3 Coupe (2008–2013) • BMW E93 M3 Convertible (2008–2013) Note: Designed exclusively for Girodisc 380mm two-piece front rotor systems. Not compatible with OEM one-piece rotors or carbon-ceramic conversions. Features • Sold as a left/right pair with complete floating hardware kit • Direct replacements for Girodisc 380mm two-piece front rotors • CNC-machined from high-carbon cast iron for improved thermal stability and durability • Directional curved vanes maximize airflow and rotor cooling • Maintains factory brake bias, ABS, and DSC calibration • Precision-balanced for vibration-free braking performance • Designed exclusively for Girodisc aluminum hats Specifications • Diameter: 380 mm • Position: Front • Material: High-carbon cast iron • Mount type: Floating two-piece system • Includes: Two rotor rings and complete hardware kit • Sold/priced per pair Girodisc D1-157 BMW E9X M3 Front Ring FAQs Do these fit the OEM M3 rotor hats? No. These are designed only for Girodisc aluminum hats and will not fit OEM one-piece rotors or carbon-ceramic conversions. What pad compounds are recommended for this setup? For street use, Ferodo DS2500 or Hawk HPS 5.0 pads work well. For track days, Pagid RS29 or Endless MX72 provide stable friction and fade resistance. What torque should be used for the floating hardware? Torque each bolt to 12 ft-lbs (16 Nm) with blue Loctite. After the first track session, recheck hardware torque for consistency. Do these rotors improve braking feel? Yes. The two-piece floating design reduces unsprung weight and improves pedal modulation by managing heat transfer more efficiently than factory rotors. Upgrade your BMW E9X M3’s braking system with Girodisc D1-157 380mm front replacement rings — engineered for endurance, balance, and precision braking on both street and circuit.