Okay, humor me on this one.
I've added following mods to a stock 3.8 V-6 CAI, Throttle Body & spacer, Underdrive pulleys, Dual Exhaust. Without the use of a tuner, I'm not getting the full benefit of these mods? It makes sense, but how easy is it to use a tuner? I really don't know enough to go into the car's "brain" and make changes. I see they can come pre-programmed. Simple plug and play???