Wilwood 140-14106-D DynaPro 4R Rear Drag Race Disc Brake Kit with Drilled Rotors

The Wilwood 140-14106-D DynaPro 4R Rear Drag Race Brake Kit delivers high-torque stopping power with significant weight savings over OE brake components. Engineered specifically for drag racing applications, this complete bolt-on rear brake kit replaces heavy factory hardware with lightweight, precision-engineered components designed to perform under the extreme demands of repeated high-speed stops.

Dynamic Mount Rotor System:

• Steel rotors weigh only 5.7 lbs. each — sized at 12.90" diameter x 0.38" thick with drilled rotor design
• Rotors attach to OE hubs via lightweight forged aluminum hats using Wilwood's T-nut mounting system
• T-nut design allows the rotor to move independently of the hat during heat cycles, eliminating stress at mount points and preventing rotor distortion common with fixed-mount steel plate rotors
• Dynamic mount design ensures full pad release for true, drag-free rotor tracking down the strip
• Parking brake eliminated for additional weight reduction

DynaPro 4R Radial Mount Calipers:

• Radial-mount DynaPro 4R four-piston aluminum calipers weigh only 4.1 lbs. each
• Features stainless steel pistons, internal bore seals, and stainless steel bridge wear plates
• Anodized finish for corrosion resistance and a clean appearance
• Tool-free pad access — pads can be serviced without removing the caliper from the mount

BP-20 SmartPad Brake Pads:

• BP-20 compound SmartPads deliver high response and strong cold holding power
• Engineered to resist fade under sustained high-temperature braking

Kit Details & Requirements:

• Full bolt-on installation to OE upright and hub — no cutting or welding required
• For drag racing use only — not recommended for street or road use
• Minimum 17" wheels required for proper clearance
• Stainless steel braided flexline kit required for installation — sold separately
• Rotor bolt pattern: 4.500"

Wilwood's 140-14106-D is the go-to rear drag brake solution for serious competitors looking to shed rotational weight, maximize straight-line stopping performance, and eliminate the reliability concerns of heavy OE components on the strip.