sgranitz

I have a 96 GT conv. 5 speed. I drive at the spedometer 75mph and the engine revs at 2250 in 5th. I checked with the GPS and i am really doing 65 mph. I have 17" double spoke factory rims. I bought this used. So in fact it is revving at 2250 at an actual 65 MPH GPS. Does this seem high? any suggestios would be a big help