This unit will fit all 1999-2004 Ford Lightning / Harley SC Trucks. Here's how it works: Press the brake pedal and hold the roll control Snap-action switch down. Remove your foot from the pedal, and the solenoid maintains line pressure to the front brakes until the switch is released. This makes it easy to heat the rear tires in the burnout box, while minimizing wear and tear on your trucks rear brake components.
The Hurst™ LINE-LOC SYSTEM is fully compatible with the factory anti-lock braking and traction-control systems. It includes a waterproof electrical solenoid, an activation switch, plug-in wires, mounting hardware, and detailed installation instructions.