Wilwood Left XRS6R Red Six-Piston Brake Caliper with 1.38/1.12/1.12-Inch Bore Sequence: 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 XRS6R Red Six-Piston Brake Caliper with 1.38/1.12/1.12-Inch Bore Sequence

SKU: 120-17208-RD

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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

This red left-hand Wilwood XRS6R is the 3.46-square-inch differential-piston version for a nominal 1.10-inch-wide rotor. The housing has an open X-bridge and internal fluid transfer, keeping its structure distinct from older externally plumbed caliper designs. 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: 120-17208-RD. Type: Forged XRS6R Radial Mount caliper.
  • Bore sequence 1.38/1.12/1.12 inches across 6 pistons. Piston construction: stainless steel; specified effective area 3.46 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 1.10 inch, with width limits of 1.00–1.10 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 10416 pad outline with a bracket that places it on the intended friction ring. Verify how the left-hand piston sequence meets the turning rotor and ensure the bleed screws can be used in the installed position.

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.