KD5033 RS-652 Brake Pads - Brembo GT4

Barbaro Racing KD5033 RS-652 brake pads for Brembo GT4, Dicase X41 / X42, Brembo 20.4862.05, manufacturer nominal18.4mm caliper family, Brembo F50, Brembo BM4 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 KD5033: 132 × 67 × 15.4 mm; interchanges with FMSI 07.B314.30, Ferodo Racing FCP1281.

Specifications

Barbaro part number	KD5033
Compound	RS-652
Barbaro factory code (SKU)	D50335N5
Axle	Front or rear, depending on where the caliper is fitted
Dimensions (L × H × T)	132 × 67 × 15.4 mm
Friction material height	51.8 mm
Supplied as	One axle set
Pad features	narrow pad; wear-sensor provision; D52 friction face
Also available for KD5033	KD5033 C-02 Silent City, KD5033 C-01 Premium Street, KD5033 S-01 Street & Track, KD5033 RS-635 Race Endurance, KD5033 CSI-01B Carbon-Ceramic

Caliper fitment

Caliper brand	Caliper	Details
Brembo	GT4	narrow pad, 51.8 mm friction face, wear-sensor socket, front or rear
Dicase	X41 / X42	D52
Brembo	20.4862.05, manufacturer nominal18.4mm caliper family
Brembo	F50	narrow pad
Brembo	BM4	narrow pad

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

FMSI	07.B314.30
Brembo Racing	07.B314.30
Ferodo Racing	FCP1281

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.