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

This black TX6R rear kit uses six-piston calipers and 16-inch GT-slotted Spec-37 rotors for the confirmed Silverado and Sierra 2500 HD applications. BP-22 pads and a 12-inch hose set are supplied, while the original parking-brake assembly is retained. Based in Camarillo, California, Wilwood Engineering has designed and manufactured disc brake systems and components since Bill Wood founded the company in 1977. Its work spans motorsport, street-performance and specialized applications, with a product range covering master cylinders, calipers, brake rotors, valves, fittings and brake lines. These parts must be chosen for the requirements of the entire brake system.

Technical Details

• Manufacturer part number: 140-18103
• Service calipers: TX6R; 6 pistons; radial mount; Black Powder Coat
• Brake rotors: 16.00 x 1.38 inches; Spec-37 Iron; GT Slotted; vented construction
• Pads: BP-22; piston material: Stainless
• 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.

Use the fitment table below to confirm the exact year, model, trim and installation 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.

Ask PMB Performance to help confirm the configuration before ordering if the vehicle has modified brakes or running gear. We have over 20 years of experience with parts and fitment; a VIN plus the installed component details gives us the best starting point.

Vehicle Applications

Application Notes

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