Wilwood Anodized XRS4R Brake Caliper, 3.00-Square-Inch Area / 1.10-Inch Rotor Width: Gray XRS caliper in an angled logo-side view, with an open X-shaped center bridge, retaining hardware and visible four-piston lettering.

Wilwood Anodized XRS4R Brake Caliper, 3.00-Square-Inch Area / 1.10-Inch Rotor Width

SKU: 120-17205

$636.44 Sale
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Fitment questions?

Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.

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Product details

An anodized forged body and four 1.38-inch stainless pistons define this Wilwood XRS4R configuration. Its rotor channel is the nominal 1.10-inch version, allowing the caliper to be selected for a brake package requiring 3.00 square inches of effective piston area. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications.

Technical Details

  • Manufacturer part number: 120-17205. Type: Forged XRS4R Radial Mount caliper.
  • Piston arrangement: 4 stainless steel pistons; bore specification 1.38/1.38 inches. Effective piston area: 3.00 square inches.
  • Hydraulic inlet thread: 1/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.
  • Mounting: radial, 5.98-inch centers; orientation: universal. 0.39-inch holes; 1.45-inch mounting height.
  • Caliper body: forged aluminum; finish: Type III Anodize.
  • Rotor channel: 1.10-inch nominal width. Specified width limits: 1.00–1.10 inch; rotor outside diameter: 11.75–14.00 inches.
  • Caliper component weight: approximately 5.1 lb.
  • Brake pad shape: 10416. Choose pad dimensions and friction material for the brake system.
  • Piston dust boots: no.
  • Component: one individual hydraulic brake caliper. Select the mating rotor, pads, mounting hardware and line connection to suit the complete brake assembly.

Fitment & Compatibility

Check an actual rotor width of 1.00–1.10 inches and a radial bracket with the specified center spacing. Wheel, hose and pad clearances need to be assessed with the assembly mounted over the correct rotor.

PMB Performance has over 20 years of brake-component experience. Send the existing caliper identification, rotor measurements and mounting details for help comparing this configuration.