Wilwood Right Red Six-Piston XRS6R, 4.86-Square-Inch Area / 1.10-Inch Rotor Channel

Six differential stainless pistons act through the pads of this red right-hand Wilwood XRS6R. The 1.75/1.25/1.25-inch bore sequence supplies 4.86 square inches of effective area, with internal fluid ports and a nominal 1.10-inch-wide rotor channel. Bill Wood established Wilwood Engineering in 1977. Based in Camarillo, California, the company designs and manufactures disc brake systems for motorsport, street-performance and specialized use, including calipers, brake rotors, master cylinders, valves, fittings and brake lines.

Technical Details

• Manufacturer part number: 120-17217-RD. Type: Forged XRS6R Radial Mount caliper.
• Attachment geometry: radial mount with 5.98-inch centers; right hand. 0.39-inch holes; 1.45-inch mounting height.
• Rotor dimensions: outside diameter 11.75–14.00 inches; nominal width 1.10 inch, with width limits of 1.00–1.10 inch.
• Pad fit uses shape 10416. Match the pad to the rotor and intended operating conditions.
• 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.
• Construction and surface: forged aluminum, finished in Red Powder Coat.
• 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.
• Piston dust boots: no.

Fitment & Compatibility

The caliper needs the correct bracket for rotor diameter and hat offset, even if the 5.98-inch centers are familiar. Confirm that the larger piston area fits the master cylinder and intended brake balance before ordering.

For help matching this caliper, contact PMB Performance with the brake-package details and rotor measurements. Our team has more than 20 years of experience with brake parts and fitment.