Wilwood Left Red Six-Piston XRS6R, 1.75/1.25/1.25-Inch Caliper for Wider Rotor Arrangements: Red XRS caliper in an angled logo-side view, with an open X-shaped center bridge, retaining hardware and visible six-piston lettering.

Wilwood Left Red Six-Piston XRS6R, 1.75/1.25/1.25-Inch Caliper for Wider Rotor Arrangements

SKU: 120-17220-RD

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Fitment questions?

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Product details

A red XRS6R body houses six differential pistons in this left-hand Wilwood brake caliper. It combines a 1.25-inch nominal rotor width with 4.86 square inches of effective area, retaining the open center bridge and internal fluid connections of the XRS range. 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: 120-17220-RD. Type: Forged XRS6R Radial Mount caliper.
  • Bore sequence 1.75/1.25/1.25 inches across 6 pistons. Piston construction: stainless steel; specified effective area 4.86 square inches.
  • Hydraulic inlet thread: 1/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.
  • Attachment geometry: radial mount with 5.98-inch centers; left hand. 0.39-inch holes; 1.45-inch mounting height.
  • Construction and surface: forged aluminum, finished in Red Powder Coat.
  • Rotor dimensions: outside diameter 11.75–14.00 inches; nominal width 1.25 inch, with width limits of 1.19–1.25 inch.
  • Caliper component weight: approximately 5.2 lb.
  • Pad fit uses shape 10416. Match the pad to the rotor and intended operating conditions.
  • 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

Use the measured rotor width, offset and friction diameter to evaluate the bracket fit. Check the 5.98-inch centers and 10416 pad arrangement as parts of that full assembly rather than as independent promises of vehicle compatibility.

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.