I just ordered the Mild-to-Wild modulator for my Z06. Love the sound of Wild! Does anyone have any pros and cons regarding this item? Does it enhance performance in any way? What about battery power usage when the car is off. I understand if I wire it so the flaps engage (to produce the wild sound) when the car is initially started, this will use zero battery power when the engine is off. What about gas mileage when in the wild position. Thanks. :cool