Wilwood Rear Anodized Six-Piston TX6R Brake Conversion, 15.50-Inch GM HD Truck Rotors — Selected 2011–2019 Applications

Anodized TX6R calipers mount over vented, slotted rear rotors measuring 15.50 inches. The kit includes its application-specific flexlines and uses the specified GM parking-brake hardware rather than adding a separate handbrake caliper. The manufacturer, Wilwood Engineering, was established by Bill Wood in 1977 and is based in Camarillo, California. It designs and builds disc brake systems with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Motorsport, street-performance and specialized applications require components selected for the complete braking system.

Technical Details

• Manufacturer: Wilwood
• Manufacturer part number: 140-13874-C
• Kit classification: Rear Brake Kits - Street Performance
• Axle position: Rear Kits
• Brake Type: Disc
• Selling unit: Sold as a kit.
• Rotor Outside Diameter: 15.50 in; 393.7 mm
• Rotor Thickness: 1.38 in; 35.05 mm
• Rotor Material: Spec-37 Iron
• Surface Type: GT Slotted
• Rotor construction: Vented
• Bolt Circle Diameter: 8 x 7.09 in; 8 x 180.09 mm
• Catalog stud / mounting-hole reference: 0.640 in; 16.26 mm
• Rotor surface finish: Black Electro Coat
• Hat material: Iron
• Hat finish: Black E-Coat
• Hat offset dimension: 2.920 in
• Master Cylinder Included: No
• Brake Booster Included: No
• Brake Lines Included: Yes
• Minimum wheel guidance (clearance drawing required): 20 in; 508 mm
• Required rear axle / flange: OEM
• Catalog axle-offset reference: 0.00 in; 0 mm
• Spindle Included: No
• Mounting Hardware Included: Yes
• Separate wheel hubs included: No
• Pistons per service caliper: 6
• Service-caliper piston construction: Stainless
• Service-caliper mount: Radial
• Caliper body construction: Forged aluminum
• Caliper Color: Anodize
• Caliper Finish: Type III Anodize
• Caliper Inlet Port Diameter: 1/8-27 NPT
• Caliper family: TX6R
• Pad compound: BP-22

Fitment & Compatibility

The listed 3500 applications are limited to single rear wheels; do not extend this rear kit to the dual-rear-wheel front-kit listings. Match the original parking-brake assembly, rear hub register and 8 x 7.09-inch pattern. The included rear flexline kit is 220-11196, as specified in DS-1086; test clearance using the actual wheel and the installation diagram.

Listed models: Silverado 2500 HD; Silverado 3500 HD Pickup; Sierra 2500 HD; Sierra 3500 HD Pickup; Silverado 3500 HD; Sierra 3500 HD; Suburban 3500 HD. Use the fitment table below for the individual years, submodels and equipment conditions.

Wilwood product specifications · Installation instructions

Our team at PMB Performance has over 20 years of parts and fitment experience. The existing component number and brake-system details help us check the match.