Granatelli's Tire Fryer Line Lock Kits are designed to keep your vehicle straight while towing down hill or in the staging lanes at the strip. Kits allow you to lock your front or rear brakes at will on all 2005-Up Mustang GT, V-6 & Shelby GT 500 vehicles. Installs in about 1-hour and will not void your factory warranty. Includes a re-buildable nickel-plated solenoid valve, activation switch (shifter mountable), arming light, stainless steel inserts, black chromate heat sinks and 3000 psi DOT approved flexible lines. 1/100,000 of a second release time & has been tested up to 30 Gs without failure.