KD5025 RS-635 Front Brake Pads - AP Racing CP5040

Barbaro Racing KD5025 RS-635 front brake pads for AP Racing CP5040, AP Racing CP4567 / CP5567 / CP6760 / CP5100, AP Racing CP5040-10 / -11 / -12 / -13, AP Racing CP3345 calipers. RS-635 is Barbaro's low-metallic endurance race compound (50–800°C, μ 0.40–0.52) — CEC 2025 TCS class winner. Pad shape KD5025: 113.4 × 52.2 × 15.3 mm; interchanges with Endless RCP095, AP Racing C3345D44, Ferodo Racing FRP219.

Specifications

Barbaro part number	KD5025
Compound	RS-635 — Race endurance low-metallic
Barbaro factory code (SKU)	D50252N5
Axle	Front
Dimensions (L × H × T)	113.4 × 52.2 × 15.3 mm
Friction material height	42.6 mm
Supplied as	One axle set
Pad features	small 4-piston caliper
Also available for KD5025	KD5025 C-02 Silent City, KD5025 C-01 Premium Street, KD5025 S-01 Street & Track, KD5025 RS-652 Race Extreme Hybrid

Caliper fitment

Caliper brand	Caliper	Details
AP Racing	CP5040	small 4-piston, 42.6 mm friction face
AP Racing	CP4567 / CP5567 / CP6760 / CP5100	pad shape CP3345 (C3345D44)
AP Racing	CP5040-10 / -11 / -12 / -13
AP Racing	CP3345	small 4-piston caliper

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

Brembo Racing	B53
Ferodo Racing	FRP219
PAGID Racing	2127
Endless	RCP095
AP Racing	C3345D44, CP3345D44
Alcon	PNF4463X529.4, PNF4463X572
CIRCO	MB1808-16
Hawk	HB192
Wilwood	8716

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

About the RS-635 compound

RS-635 · The endurance champion

The CEC 2025 class winner. At Tianfu International Circuit, a Hongqi H6 on RS-635 ran a 200-minute stint against PAGID RST3's 120 — with less wear.

Temperature range: 50–800°C
Friction: μ 0.40–0.52 (steel disc)
Formula: Race endurance low-metallic
Discs: Steel and carbon-ceramic
CEC Championship validated — TCS class winner
200 min endurance on a single set
Ideal for: Endurance racing in heavier GTC and touring cars

RS-635 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.