Ok, I am totally new to modifying cars... so laugh as hard as you want in answer my questions. I am looking at a DC Sport Exhaust for a 92-98 Civic.

Now, I know the Del Sol is based off of a civic, so is safe to buy this item knowing that it will fit on my '93 Del Sol S?

Also, what the hell does a cat back exhaust do? (I need a new exhaust because my other piece of shit is rusting away) Will it improve or decrease my miles per gallon, because seriously thats the most important thing to me.

Thanks guys