Wilwood Red Left Front TX6-DM Brake Caliper for GM 2500/3500, 2011–2019 / Differential Pistons: Red TX6-DM body showing white Wilwood lettering, six-piston text and the pad channel.

Wilwood Red Left Front TX6-DM Brake Caliper for GM 2500/3500, 2011–2019 / Differential Pistons

SKU: 120-17642-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

The left front caliper in this GM 2500/3500 conversion uses an 11.22-inch direct-lug interface, distinguishing it from the later GM pattern. This red Wilwood TX6-DM carries six stainless pistons with 8.70 square inches of effective area. Its housing accepts the nominal 1.50-inch rotor-width arrangement used in the 2011–2019 truck package. 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: 120-17642-RD. Type: TX6-DM Forged Lug Mount caliper.
  • Piston arrangement: 6 stainless steel pistons; bore specification 2.00/1.88/1.88 inches. Effective piston area: 8.70 square inches.
  • Rotor channel: 1.50-inch nominal width. Specified width limits: 1.42–1.50 inch; rotor outside diameter: 15.00 inches.
  • Mounting: lug, 11.22-inch centers; orientation: left hand.
  • Hydraulic inlet thread: 1/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.
  • Caliper body: forged aluminum; finish: Red Powder Coat.
  • Brake pad shape: 10120. Choose pad dimensions and friction material for the brake system.
  • 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: yes.
  • Caliper component weight: approximately 14.6 lb.

Fitment & Compatibility

Check the truck's existing conversion against the matched Wilwood 15.00-inch rotor and flexline instructions. Confirm pad placement and caliper alignment before assessing wheel clearance; retain the left-hand piston sequence and do not substitute another lug pattern because its bores match.

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.