I just got off the phone with Doug Levin Motorsports in Broward county (south florida), asking what it should cost to throw in 3.55 gears out back and have it calibrated. Since I'm a pre-med student I don't have the time to do it myself, nor the know how to be honest. To get to the point, they told me it would cost about $1600 to do the work. I have no prior knowledge since I never managed to install gear in my mustang (not to compare the stang to the viper) of what it should cost. they also mentioned something about removing the exhaust in order to do the work. anyone know if that sounds right or are they trying hustle me? I hear they do good work but still does'nt hurt to consult the forum.