We take a diffrent approach similar to Willwoods recommendation.We install them on the back brakes to adjust the pressure to allow a slight nose down during braking.To allow rear brakes with large slicks(with low air pressure) to to grab first can cause out of control skidding and slipping at high speeds since the majority of the weight during decelleration is to the front.This holds true for cars with chutes also,you don't want the back slicks locking and dragging at hi-speeds,use the chute to slow down the initial speed then use the brakes once you have slowed down to a managable speed