These GiroDisc A1-012 front 2-piece rotors are a direct replacement for the factory front rotors on 2001-2006 BMW M3 (E46) with the 345 mm Competition Package (ZCP) or CSL front brakes. A reusable 6061-T6 aluminum hat carries a floating cast iron ring, so only the ring needs replacing when it wears. Each assembly weighs about 17.5 lbs.

GiroDisc A1-012 2-Piece Brake Rotor Features:

• Fits 2001-2006 BMW M3 (E46) with the 345 mm Competition Package (ZCP) or CSL front brakes
• Measures 345 mm in diameter and 28 mm thick, with a 26 mm minimum thickness for ring replacement
• Weighs approximately 17.5 lbs. per rotor assembly
• Ring is machined from proprietary high-carbon cast iron with 48 curved vanes that pump cooling air through the disc
• Hat is machined from 6061-T6 aluminum and finished in black anodize
• Fully floating mount uses cadmium-plated alloy steel drive pins with hardened washers
• Spring clips and Belleville washers provide race-ready float without noise from loose hardware
• Designed around the stock ZCP and CSL sliding calipers as well as Porsche 996 and Megane RS Brembo caliper swaps
• Replacement rings are available as GiroDisc D1-012
• Sold as a pair