GM 4 Banger Exhaust??

Not specifically for Chevrolet thread, but there's no GM-specific thread. I'm looking for suggestions on an '85 2.0 Buick 4 cylinder exhaust. It being as old as it is, you can already hear what little rumble there is, but I'm looking for something to clean up the sound and make it a little more clear and choppy. Now, I realize there isn't much chop or noise coming out of this engine, but any suggestions other than a full straight pipe would be much appreciated. Thanks all