GiroDisc GD380.35.52 380x35mm Replacement Rotor Rings for BMW E9X M3/1M

Vehicle Fitment

• BMW E82 1 Series M Coupe (N54 3.0L)
• BMW E90/E92/E93 M3 (S65 4.0L)

Fitment Notes

• Plug-and-play replacement rings for existing 380x35mm Brembo or StopTech big brake kit hats - requires an existing compatible hat, not a complete rotor assembly

Features

• Proprietary cast iron, poured and machined in-house in the USA
• 48 curved vanes act as a centrifugal pump to force cooling air through the disc
• Cryogenically treated for extended rotor life
• Includes new floating pin hardware
• Serviceable two-piece design reduces unsprung weight vs. a one-piece rotor

Specifications

• Outer Diameter: 380mm
• Thickness: 35mm
• Material: Proprietary cast iron
• Vane Count: 48 curved vanes
• Quantity: Sold as a pair with 2 hardware kits

Included Components

• 2x 380x35mm Replacement Rotor Rings
• 2x Floating Pin Hardware Kits

Product Description

The GiroDisc GD380.35.52 is a pair of 380x35mm replacement rotor rings built to bolt directly onto existing Brembo or StopTech big brake kit hats on the BMW E82 1M and E90/E92/E93 M3. Rather than replacing a full two-piece rotor assembly, these rings let you refresh just the wear surface while reusing your current hats.

Cast from GiroDisc's proprietary iron and cryogenically treated for durability, each ring uses 48 curved vanes to actively pump cooling air through the disc during braking. New floating pin hardware is included, making this a cost-effective way to extend the life of an existing big brake kit without a full rotor replacement.