I drive an auto in mine and can't believe I didnt buy an SB sooner. I was skeptical as well, but took the plunge and my crossfire is a whole new car. It makes it quicker, and a whole lot more responsive. I usually hot rod in my replica cobra and love the snappy response from that car, and my only complaint about the crossfire was how slow it responded. If I was driving the crossfire and somebody wanted to play, by the time the crossfire decided to move (with me fully depressing the pedal) they were gone whether my car was quicker or not. Now, if I push the gas, it moves and thats what its all about. Just my two and a half cents worth