i have a 2004 gt and no mach system, is there going to be any troubles trying to install a aftermarket h/u that i should know about, and if its just a single din h/u what will i need to make it fit and look good.?

 

might be cool to fiberglass on your center dash piece to make the new hu fit in an exact hole. so there is no gap between the headunit and the center dash trim, and it doesn't look aftermarket.

 

installing an aftermarked h/u is extremley easy. Just go to any place that sells automotive audio equipment. Buy an installation kit, and a wire harness. Pop off the plastic peice around your shifter, then the peice around your head unit. That will save you some trouble right there.