Actually the Mach 1 sits an inch lower than the GT. And although Machs do handle pretty good from the factory, IMO they still dont look lowered to me. I have H&R supersports on mine which lower a Mach about another inch (or 1.8 inches on a GT). Its always a good idea to replace the struts & shocks with something more matched to the stiffer spring rate of lowering springs. The Mach 1 tokicos might work ok though.