Wilwood Rear Brake Kit for Silverado/Sierra 2500 HD (2020–2026) — Red TX6R, 16-Inch GT-Slotted

Red six-piston TX6R calipers distinguish this rear brake package for listed Silverado/Sierra 2500 HD models. Its 16 x 1.38-inch rotors, BP-22 pads and included hoses form the hydraulic conversion around the existing parking-brake hardware. Wilwood Engineering designs and manufactures the disc brake systems and components used throughout its motorsport, street-performance and specialized product range. Bill Wood established Wilwood in 1977, and the company is based in Camarillo, California. Its calipers, brake rotors, valves, master cylinders, brake lines and fittings are selected according to the demands of the whole brake installation.

Technical Details

• Manufacturer part number: 140-18103-R
• Rotor specification: Spec-37 Iron, GT Slotted, vented; 16.00 x 1.38 inches
• Caliper specification: 6-piston TX6R in Red Powder Coat; radial mount
• Included service pad compound: BP-22; Stainless pistons
• Caliper body material: Forged aluminum
• Hydraulic inlet: 1/8-27 NPT
• Rotor/hat wheel-stud clearance pattern(s): 8 x 7.09 in; 8 x 180.09 mm; match the installed hub/axle pattern
• Parking arrangement: retain the original parking-brake assembly
• Hydraulic brake hoses: included; DOT-approved hose kit
• Wheel clearance: 20-inch wheels may fit; verify the manufacturer’s complete caliper/rotor template for the installed wheel
• Supplied as one kit with mounting hardware; spindles, hubs, master cylinder and booster are not included

Fitment & Compatibility

Current Wilwood application data confirms the listed 2020–2026 Silverado 2500 HD and Sierra 2500 HD trims. The supplied table also contains 3500 HD single-rear-wheel entries, but those are absent from the current kit application page; obtain Wilwood confirmation for a 3500 HD before ordering. Do not assume dual-rear-wheel compatibility.

The 16-inch brake rotors require verification against the wheel-clearance diagram even with a nominal 20-inch wheel. Retain the original parking-brake mechanism and install the supplied 12-inch hydraulic hose set with suitable clearance.

Check the complete application table below, including its model-year splits and configuration notes.

Manufacturer Resources

• Exact Wilwood kit specifications and wheel-clearance information
• Installation instructions and component list

WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.

PMB Performance brings over 20 years of experience with brake components and fitment details. Send us your VIN together with the installed axle, spindle, brake and wheel specifications if you need help confirming this package.

Vehicle Applications

Application Notes

1. Line kit included (manufacturer): 220-11196 (12.00 in)
2. Rear line-kit reference: 220-11196