Wilwood 140-14100-D DynaPro 4R Front Drag Race Brake Kit with 12.90" Drilled Rotors

The Wilwood DynaPro 4R Front Drag Race Brake Kit (140-14100-D) is engineered to deliver maximum stopping torque with a dramatic weight reduction compared to factory brake components. Purpose-built for drag strip use, this complete bolt-on front brake system mounts directly to the OE spindle with no modifications required.

Lightweight Dynamic Mount Rotors:

• 12.90" x 0.38" cross-drilled steel rotors weigh only 5.7 lbs each — significantly lighter than OEM
• Rotors attach to OE hubs via lightweight forged aluminum hats using Wilwood's proprietary T-nut floating mount system
• The floating design allows the rotor to move independently of the hat during heat cycles, eliminating stress at mount points and preventing rotor distortion
• Dynamic mounting ensures full pad release after each stop, keeping the rotor running true and drag-free down the track

DynaPro 4R Radial Mount Calipers:

• Forged aluminum radial mount DynaPro 4R four-piston calipers weigh only 4.1 lbs each
• Feature stainless steel pistons for corrosion resistance and reduced heat transfer from pads
• Internal bore seals and stainless steel bridge wear plates for long service life
• Tool-free pad access — pads can be serviced without removing the caliper from the mount
• Anodized gray finish for durability and clean appearance

BP-20 SmartPad Compound:

• Included BP-20 compound SmartPads provide strong cold bite and high response for immediate holding power off the line
• Engineered to resist fade under repeated high-heat braking conditions on the strip

Kit Highlights & Requirements:

• Complete bolt-on installation to OE spindle — no spindle or steering linkage modifications needed
• Configured for drag racing use only — not recommended for street driving
• Minimum 17" wheel diameter required for caliper clearance
• Compatible with OE master cylinder output — no master cylinder upgrade needed
• Stainless steel braided flexline kit required for installation (sold separately)

The Wilwood 140-14100-D DynaPro 4R drag brake kit is the definitive front braking upgrade for racers seeking maximum clamping force, reduced unsprung weight, and reliable rotor release — all in a proven, complete bolt-on package.