Yes it does add to the tab... I am not looking for speed but just to lower the RPM's on the stock 216 at 50-60 MPH. The 216 is strong but I just don't know what is to much and for how long. I want to drive my truck to some shows that are about a 45 mile drive on the highway to I just don't want to kill the motor. And yes I don't want to spend a fortune right now. So is that a GO or NO GO... Thanks!