Wilwood BP20 Pads for Grand National III, GN4R/GN6R and AV6R

These BP20 pads use the broad 0.80-inch profile listed for Grand National III, GN4R, GN6R and AV6R calipers. The published pad area is 11.1 square inches, making plate size as important as thickness when comparing this set with smaller Superlite-style pads. The manufacturer is Wilwood Engineering, established in 1977 by Bill Wood and based in Camarillo, California. Its design and manufacturing work covers disc brake systems and components—calipers, brake rotors, master cylinders, valves, fittings and brake lines—for street-performance, motorsport and specialized applications. Selection must account for how those components operate together.

Technical Details

• Manufacturer part number: 150-20-7520K
• Pad profile: 7520
• Friction compound: BP20
• Package quantity: 4 pads
• Pad thickness: .80 inch
• Published pad area: 11.1 square inches
• Published pad volume: 6.9 cubic inches
• Rotor compatibility: Steel, Stainless Steel, Iron
• Bedding status: not pre-bedded; follow Wilwood bedding procedure

Fitment & Compatibility

Wilwood’s compatible-caliper list names AV6R Radial Mount, Grand National GN4R, Grand National GN6R, Grand National III. Match the backing-plate outline, retention features and new-pad thickness to the actual caliper. The pad profile identifies the shape; it does not by itself establish vehicle fitment or axle position.

The BP20 compound balances street compatibility with the greater heat range needed in track days, autocross and moderately demanding competition. It can run against iron, steel and stainless-steel rotors. Low-to-moderate dust and noise ratings accompany a friction curve that builds as the brakes warm.

Reference: Wilwood product specifications and compound guidance. Manufacturer profile illustration.

For selection assistance, PMB Performance combines over 20 years of experience with a focus on the actual braking hardware. Share the caliper specification and intended use before ordering an uncertain fit.

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.