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Product details
This XRZ4R replacement set uses a 0.80-inch pad thickness with BP10 friction. The thicker pad specification distinguishes it from similar-looking XRS applications; match the XRZ4R caliper and its pad pocket before ordering. Wilwood Engineering, based in Camarillo, California, was founded in 1977 by Bill Wood. It designs and manufactures disc brake systems for specialized, motorsport and street-performance applications, supplying calipers, brake rotors, master cylinders, valves, fittings and brake lines. These parts should be selected together to meet the complete brake system’s requirements.
Technical Details
- Manufacturer part number: 150-16865K
- Bedding status: not pre-bedded; follow Wilwood bedding procedure
- Pad profile: 10420
- Friction compound: BP10
- Package quantity: 4 pads
- Pad thickness: .80 inch
- Published pad area: 8.2 square inches
- Published pad volume: 4.9 cubic inches
- Rotor compatibility: Steel, Iron
A modest heat requirement is central to choosing BP10: the compound is suitable for street use, drag racing and light-to-medium braking on dirt. It works with steel and iron rotors and offers gradual response with low dust and noise ratings, rather than the aggressive behavior of a dedicated high-temperature race pad.
Fitment & Compatibility
Wilwood’s compatible-caliper list names XRZ4R Radial Mount. Select this profile only after checking the installed caliper, pad abutments and retaining hardware. New-pad thickness must leave the working clearance required by that brake assembly.
Reference: Wilwood product specifications and compound guidance. Manufacturer profile illustration.
PMB Performance has 20+ years of experience working through brake fitment details. Have the caliper type, rotor material and pad dimensions ready when asking us to confirm the choice.
WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.
