Hurst Shifters The Original Roll Control Hill Holding Device

Whether you use it on the street when towing a trailer, on the strip smoking your tires or even off-road. This brake-line control unit works as follows: press and hold brake pedal down, then press & hold the control switch down, release the brake pedal while still holding the switch down and the solenoid will maintain line pressure to the front brakes locking them up and allowing your rear tires to free wheel until switch is released.
The Roll Control Installation Kit is sold separately, with part #52155.11