It is sort of ricey to try and make a car sound like another car. Why didn't you purchase a g35 instead of a crossfire since you are so hooked on them? Do you have any performance mods in mind for your car or are you going to load it up with stereo equipment and 24" pimp wheels?

If you want to make your car louder or "sound" faster just hacksaw off the muffler or drill holes in it lol.