KD5054D RS-652 Brake Pads - AP Racing CP9440

Barbaro Racing KD5054D RS-652 brake pads for AP Racing CP9440, AP Racing CP9448, AP Racing CP9200 calipers. RS-652 is Barbaro's extreme hybrid race compound for steel and carbon-ceramic rotors (50–800°C, μ 0.49–0.57 on steel). Pad shape KD5054D: 132.6 × 55.9 × 19.9 mm; interchanges with AP Racing CP3215D50, Ferodo Racing FRP212.

Specifications

Barbaro part number	KD5054D
Compound	RS-652
Barbaro factory code (SKU)	D5054D5N5
Axle	Front or rear (caliper-dependent)
Dimensions (L × H × T)	132.6 × 55.9 × 19.9 mm
Drawing note	Drawing is rotated (long side vertical): length = vertical dimension, height = horizontal dimension. Backing plate 5.5. Both price-list drawings identical.
Supplied as	One axle set
Pad features	19.9 mm thick
Also available for KD5054D	KD5054D RS-620 Race Lightweight, KD5054D RS-635 Race Endurance

Caliper fitment

Caliper brand	Caliper	Details
AP Racing	CP9440	19.9 mm thick
AP Racing	CP9448	19.9 mm thick
AP Racing	CP9200	19.9 mm thick

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

Ferodo Racing	FRP212
AP Racing	CP3215D50

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

About the RS-652 compound

RS-652 · The extreme hybrid

Seven years in the making. Endurance and sprint on both carbon-ceramic and steel rotors with zero fall-off, protected by a self-renewing 1–3 micron transfer film. Average friction 0.555 μ — measured beyond PAGID RSL1 (0.510) and Endless MA45B (0.438).

Temperature range: 50–800°C
Friction: μ 0.49–0.57 (steel); rising with temperature on CCB
Discs: Steel + carbon-ceramic
Lock threshold: 95 bar (RS-635: 65 bar)
+46.1% lock threshold — 95 bar vs 65 bar
On CCB, friction rises with temperature — 0.689 μ at 800°C
Disc wear 0.001 mm — 1/9 of RSL1, 1/18 of MA45B
Ideal for: TCR, GT and touring-car racing on steel or carbon-ceramic discs

RS-652 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.