This is not true. Zex's WOT activation is NOT a window switch. Zex's kit can be set so that the system activates (after being engaged) only at wide open throttle. However, you can hit rev limiter on a manual and spray through shifts on an auto with Zex's system UNLESS you use a window switch. With a window switch, you can set the system to only engage at WOT within a certain rpm range. For instance, you can set your set the window switch on a car with an auto tranny to stop spraying at the rpm when your tranny is set to shift so that you don't spray through shifts. I am quite certain that my tranny would have lasted longer if someone would have told me about this sooner. It is the most important advice I can share with anyone planning to spray nitrous on an auto tranny. Tranny problems caused by mis-use of a nitrous system are just as common, if not more common, than motor problems so please don't forget considering ways to avoid tranny problems.