Wilwood 140-17749 TX6R Rear Big Brake Kit Ram 2500 3500 16in

The Wilwood 140-17749 TX6R Big Brake Truck Rear Brake Kit is engineered to deliver extreme-duty rear braking performance for 2019–2023 Ram 2500 and 3500 trucks. Designed to replace the factory rear disc brakes while retaining the OEM parking brake assembly, this kit provides exceptional stopping power, heat capacity, and durability to complement front big brake upgrades.

Featuring Wilwood’s Tactical Extreme TX6R six-piston radial-mount calipers and massive 16.00-inch GT directional vane rotors, this rear brake system is built to withstand sustained high heat from towing, hauling, performance driving, and armored vehicle use. TX6R calipers are volume-matched for compatibility with factory power brake systems, ensuring proper pedal feel and braking balance.

This ready-to-install kit includes radial mount brackets, rotors, calipers, pads, and required mounting hardware. Some applications may require the purchase of braided stainless steel flex lines separately.

Key Features & Benefits

• Complete TX6R rear big brake kit for Ram HD trucks

• Designed for 2019–2023 Ram 2500 & 3500

• Tactical Extreme six-piston TX6R calipers

• Black powder-coated calipers for durability and corrosion resistance

• Massive 16.00-inch rotors for maximum heat capacity

• GT slotted rotor design improves cooling and pad bite

• Retains OEM parking brake assembly

• Volume-matched calipers for factory brake system compatibility

• Built for towing, hauling, and extreme-duty use

• Direct bolt-on replacement for factory rear disc brakes

Kit Specifications

• Rear End Axle: OEM

• Axle Offset: 0.00

• Mount Type: Radial

• Caliper Type: TX6R – 6 Piston

• Caliper Finish: Black Powder Coat

• Rotor Diameter: 16.00 in

• Minimum Wheel Diameter Required: 20 in

Calipers Included

• Left Hand Caliper: Wilwood 120-14600-BK

• Right Hand Caliper: Wilwood 120-14599-BK

• Caliper Type: TX6R

• Piston Count: 6

• Piston Sizes:

  • 1.62 in

  • 1.38 in

  • 1.38 in

• Total Piston Area: 5.06 in²

• Piston Material: Stainless Steel

• Brake Pad Plate: 10120

• Brake Pad Area: 12.69 in²

• Brake Pad Volume: 6.81 in³

• Pad Compound: BP-Q

Rotors Included

• Left Hand Rotor: Wilwood 160-15384-GTB

• Right Hand Rotor: Wilwood 160-15384-GTB

• Rotor Type: GTB Vented Rotor & Hat

• Rotor Style: GT Slotted

• Surface Finish: Black Electro Coat

• Material: Iron

• Outside Diameter: 16.00 in

• Rotor Width: 1.38 in

• Vane Count: 48

• Design Type: GT-BLK

Package Contents

• (2) TX6R six-piston rear brake calipers (LH & RH)

• (2) 16.00-inch GT slotted vented rear brake rotors

• BP-Q performance brake pads

• Radial mount caliper brackets

• Required mounting hardware and accessories

Note: Braided stainless steel flex lines may be required for some applications and are sold separately.

Vehicle Fitment

• 2019–2023 Ram 2500

• 2019–2023 Ram 3500 (Single Rear Wheels Only)

• OEM rear axle applications

• Requires minimum 20-inch wheels

• Retains factory parking brake system

• Professional installation recommended

Additional Notes

• Designed to complement TX6R front big brake kits

• Wheel clearance must be verified prior to installation

• Brake system modifications may not be legal for street use in all regions

• Always perform proper brake bedding after installation