Barbaro Racing KD5017 S-01 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. S-01 is Barbaro's semi-metallic street and track-day compound (800°C, μ 0.35–0.50). Pad shape KD5017: 130 × 81.4 × 15.8 mm; interchanges with Endless RCP100, AP Racing CP6600D55, Ferodo Racing FRP3083.

Specifications

Caliper 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.

Cross-reference / interchange numbers

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

About the S-01 compound

S-01 · Where street meets track

Semi-metallic compound for street performance and track-day duty. Superior controlled deceleration at speed, excellent noise compatibility — and proven on the rear axle of professional race cars.

• Temperature rating: 800°C
• Friction: μ 0.35–0.50
• Formula: Semi-metallic
• 800°C maximum temperature rating
• Street-legal track day capability
• Superior high-speed deceleration control
• Pro-level rear axle performance
• Ideal for: Track days, heavy high-performance street cars and race-car rear axles

S-01 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.