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GiroDisc presents its 2-piece rotors tailored for BMW's E46 M3 Competition Package (ZCP) and CSL models, providing a direct replacement for the stock 345mm rotors. These rotors redefine performance, weighing only 17.5 lbs per rotor, compared to the factory 19 lbs, resulting in a significant reduction of unsprung weight and rotational mass at the front axle.
Crafted from a proprietary high-carbon iron casting to GiroDisc’s exacting standards, these rotor rings offer unparalleled durability. Featuring 48 curved vanes acting as a centrifugal pump, they draw air through the hub for optimal cooling even during intense usage.
The 2-piece construction allows for a reusable hat, offering ease of maintenance. Replacement is simplified by attaching new rings (part number D1-012) to the existing hat.
Each essential component, from the hats to the rotor rings and drive pins, is meticulously crafted in-house at GiroDisc's Bellingham, WA facility, using domestically sourced materials. The hat is made from 6061-T6 aluminum with a sleek black anodized coating, while the drive pins are crafted from a robust steel alloy and plated with cadmium for enhanced corrosion resistance.
These rotors seamlessly integrate with common aftermarket caliper setups and stock sliding calipers found on ZCP and CSL models, including compatibility with Brembo calipers from Porsche 996 and Megane RS swaps.
With race-ready float ensured by spring clips and Belleville washers, these rotors deliver high performance on the track while maintaining street-friendly characteristics with no noise from loose hardware. Experience the pinnacle of braking excellence with GiroDisc's E46 M3 rotors.
E46 M3 Front Brake rotors/discs (Left and Right Pair) with anti-corrosion coating. This pair of rotors includes both left and right discs, replacing BMW part numbers 34112229529 and 34112229530. These are the standard US-spec rotors, as originally fitted to the 2001-2006 US market M3 (Euro rotors were 2-piece and cross-drilled). These are sold as a pair and the price includes one left front brake disc (commonly listed as BMW part # 34-11-2-229-529 / 34112229529) and one right front brake disc (commonly listed as BMW part # 34-11-2-229-530 (34112229530).
What sets these rotors apart from OE BMW or OEM parts is the corrosion-resistant coating that is applied to the rotor-hat and inner vanes. This super-durable coating prevents rust, ruining the appearance of your car. Aftermarket brake discs do not usually have any coating on them, exposing them to rust and corrosion as soon as they are put on the car. These premium rotors, manufactured by Meyle, are the equal or better than any OEM or even OE BMW part but at a much more attractive price!
This item fits the following BMWs:
2001-2006 E46 BMW M3, M3 Convertible - except ZCP/CSL package