Hey... I had a question hopefully you guys could help me out. I have a 1990 300zx and though there is nothing wrong with the car, from listening to the car from outside.. it has good volume but does not sound nice. Ive never really modified my Z in any way.. but i am willing to make the effort to make it sound not louder but more pleasing to the ear. And most importantly i have very little money to spend. So wats the cheapest way possible to make my car sound awsome? but not the loudd annoying sound of some modified cars. :) thanks