KD6235 CSI-01B Rear Brake Pads - BMW 4 Series

Barbaro Racing KD6235 CSI-01B rear brake pads for BMW 4 Series / Z4, Toyota Supra and BMW M Performance single-piston 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 KD6235: 110.7 × 65.9 × 16 mm; interchanges with FMSI D2220.

Specifications

Barbaro part number	KD6235
Compound	CSI-01B
Barbaro factory code (SKU)	D62355N6
Axle	Rear
Dimensions (L × H × T)	110.7 × 65.9 × 16 mm
Friction material height	63 mm
Supplied as	One axle set
Also available for KD6235	KD6235 C-01 Premium Street, KD6235 S-01 Street & Track, KD6235 RS-635 Race Endurance

Caliper fitment

Caliper brand	Caliper	Details
BMW M Performance	single-piston (rear), new-type pad	64 mm friction face

Vehicle fitment

Make	Model	Chassis	Years	Engine / variant
BMW	4 Series	G23, G22	2020–	425i, 2.0T, 430i, 430i coupe
BMW	Z4	G29	2018–	Z4 M40i, 3.0T, Z4 sDrive25i, 2.0T
Toyota	Supra	DB	2020–	2.0T, 3.0T

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	D2220

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.