Wilwood Anodized Left XRS6R Brake Caliper, 1.25-Inch Rotor Width and Six Differential Pistons: Gray XRS caliper in an angled logo-side view, with an open X-shaped center bridge, retaining hardware and visible six-piston lettering.

Wilwood Anodized Left XRS6R Brake Caliper, 1.25-Inch Rotor Width and Six Differential Pistons

SKU: 120-17220

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Product details

An anodized housing, left-hand orientation and 1.25-inch nominal rotor channel define this Wilwood XRS6R. Six differential stainless pistons provide 4.86 square inches of effective area, for a brake package that must be evaluated mechanically and hydraulically. 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: 120-17220. Type: Forged XRS6R Radial Mount caliper.
  • Rotor channel: 1.25-inch nominal width. Specified width limits: 1.19–1.25 inch; rotor outside diameter: 11.75–14.00 inches.
  • Piston arrangement: 6 stainless steel pistons; bore specification 1.75/1.25/1.25 inches. Effective piston area: 4.86 square inches.
  • Caliper body: forged aluminum; finish: Type III Anodize.
  • Mounting: radial, 5.98-inch centers; orientation: left hand. 0.39-inch holes; 1.45-inch mounting height.
  • Brake pad shape: 10416. Choose pad dimensions and friction material for the brake system.
  • Hydraulic inlet thread: 1/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.
  • Piston dust boots: no.
  • Caliper component weight: approximately 5.2 lb.
  • 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 the 10416 pads against the rotor's actual swept ring and verify the bracket's mounting height. The width range is 1.19–1.25 inches, with rotor diameter and offset assessed separately from that measurement.

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.