i am running the ez alone right now waiting for my tst to come back. I have un hooked it and hooked it back up and tried all three positions with the switch. I can't tell any difference at all. I know theres not much to expect, but I should be able to feel something. Maybe it isn't working at all. I thought my truck felt a little weak with the tst/ez stack. I took the ez off last night and put my BDDL CL back on and this thing will GO!. Smokes like a freight train with the DDP sticks. I'm just wandering with my setup if the BDDL alone is gonna make more hp that the tst/ez stack. Can't wait to dyno.