Wilwood Anodized Forged Dynapro Low-Profile Caliper, 1.38-Inch Pistons / 0.50-Inch Rotor Width

The low-profile Wilwood Forged Dynapro is designed around limited outboard hat clearance and a narrow rotor swept area. This anodized four-piston version has 1.38-inch stainless pistons and a nominal 0.50-inch rotor-width channel, with 5.25-inch lug centers. From its base in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and components. Bill Wood founded the company in 1977; its motorsport, street-performance and specialized range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines.

Technical Details

• Manufacturer part number: 120-17460. Type: Forged Dynapro Lug Mount Low-Profile caliper.
• Type III Anodize finish on a forged aluminum body.
• 4-piston hydraulic layout with 1.38/1.38-inch bores and 3.00 sq in of effective area; piston type: stainless steel.
• 5.25-inch-center lug attachment, universal orientation. 0.39-inch holes; 2.10-inch mounting height.
• Component: one individual hydraulic brake caliper. Select the mating rotor, pads, mounting hardware and line connection to suit the complete brake assembly.
• Nominal rotor width 0.50 inch; compatible width range 0.44–0.50 inch. Rotor diameter specification: 11.00–13.06 inches.
• Compatible pad profile 4812; confirm thickness and compound for the installation.
• Caliper component weight: approximately 3.6 lb.
• Hydraulic inlet thread: 1/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.
• Piston dust boots: no.

Fitment & Compatibility

Match the 4812 pad outline and the caliper's position relative to the rotor hat. Check 11.00–13.06-inch rotor diameter and the 0.44–0.50-inch width limits together; a low-profile body does not remove the need to verify wheel clearance.

PMB Performance brings over 20 years of experience to brake-component selection. Share the installed caliper, rotor size and mounting arrangement so the relevant dimensions can be compared.