KD5017 CSI-01B Brake Pads - AP Racing CP8530 / CP9540

Barbaro Racing KD5017 CSI-01B brake pads for AP Racing CP8530 / CP9540, Alcon RC4, AP Racing CP8530-2/-3/-4/-5 and CP9540 D55 family, AP Racing CP9541, AP Racing CP9542 calipers. 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 KD5017: 130 × 81.4 × 15.8 mm; interchanges with Endless RCP100, AP Racing CP6600D55, Ferodo Racing FRP3083.

Specifications

Barbaro part number	KD5017
Compound	CSI-01B
Barbaro factory code (SKU)	D50175N6
Axle	Front or rear, depending on where the caliper is fitted
Dimensions (L × H × T)	130 × 81.4 × 15.8 mm
Friction material height	55.3 mm
Supplied as	One axle set
Also available for KD5017	KD5017 C-02 Silent City, KD5017 C-01 Premium Street, KD5017 S-01 Street & Track, KD5017 RS-635 Race Endurance, KD5017 RS-652 Race Extreme Hybrid

Caliper fitment

Caliper brand	Caliper	Details
AP Racing	CP8530 / CP9540	55.3 mm friction face, front or rear
Alcon	RC4	D55
AP Racing	CP8530-2/-3/-4/-5 and CP9540 D55 family
AP Racing	CP9541
AP Racing	CP9542

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.

Cross-reference / interchange numbers

WVA	24974, 20345
Ferodo Racing	FRP3083
PAGID Racing	4345, 20345
Endless	RCP100
AP Racing	CP6600D55, CP8530D55
CIRCO	MB1656
Hawk	HB585.660

Interchange numbers identify the matching pad shape. Friction material, shims and wear-sensor hardware can differ between brands.

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.