Wilwood Right XRS6R Anodized Caliper for 1.25-Inch Rotor Width, Six Differential Pistons

This anodized right-hand Wilwood XRS6R provides the wider 1.25-inch nominal rotor channel with a 4.04-square-inch effective piston area. Six stainless pistons work in the forged X-bridge housing, making rotor width and bore sequence separate selection factors. 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: 120-17213. Type: Forged XRS6R Radial Mount caliper.
• Mounting: radial, 5.98-inch centers; orientation: right hand. 0.39-inch holes; 1.45-inch mounting height.
• Rotor channel: 1.25-inch nominal width. Specified width limits: 1.19–1.25 inch; rotor outside diameter: 11.75–14.00 inches.
• Brake pad shape: 10416. Choose pad dimensions and friction material for the brake system.
• Piston arrangement: 6 stainless steel pistons; bore specification 1.62/1.12/1.12 inches. Effective piston area: 4.04 square inches.
• Hydraulic inlet thread: 1/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.
• Caliper body: forged aluminum; finish: Type III Anodize.
• Caliper component weight: approximately 5.3 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

Match the rotor's 1.19–1.25-inch width to this housing and verify the bracket offset. A six-piston caliper intended for a 1.10-inch-wide rotor is not the same bridge configuration, even where its bores and mounting centers agree.

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.