Barbaro Racing KD4172W CSI-01B front brake pads for BMW M5. CSI-01B is Barbaro's designated carbon-ceramic disc compound (−30–600°C, μ 0.40–0.43, SAE J2521 AA noise rating). Pad shape KD4172W: 209.8 × 100.4 × 18.4 mm.

Specifications

Vehicle fitment

Fitment is compiled from the Barbaro Racing application catalogue and Barbaro factory data, together with the vehicle listings of the interchange part numbers below. Brake packages can differ within one model — please compare your current pads with the dimensions and drawing, or send us your VIN, before ordering.

About the CSI-01B compound

CSI-01B · The designated compound

The designated formula for short-fiber molded coated carbon-ceramic discs — built on the CSI-01 lineage dating to 2019. High performance and low noise, finally unified. And cold bite that Ferrari and Lamborghini carbon-ceramic systems have always lacked.

• Temperature window: −30–600°C
• Friction: μ 0.40–0.43
• Noise rating: SAE J2521 AA
• Disc: Carbon-ceramic
• SAE J2521 noise rating AA — on unmodified bare pads
• Friction rises with temperature — exceeding 1.0 μ in fade tests
• 2,000+ vehicles on road · fewer than 5 noise cases
• Ideal for: Carbon-ceramic street cars, including Ferrari and Lamborghini CCB systems

CSI-01B full specifications on barbaro-racing.com

About Barbaro Racing

Barbaro Racing (野蛮人) is the performance brand of the CAC Racing Division — proprietary compounds developed entirely in-house. Development begins on the dynamometer and ends on the circuit: every friction formula is bench-tested to destruction before earning the right to carry the Barbaro name. All compounds are validated against GB5763-2018 national standards; Street Series compounds are asbestos-free.