I have heard that the 3" Exhaust from Forward Motion fits good, and people are amazed that a 3" exhaust can even fit there. Here is the link: Forward Motion, Inc. 2007 Catalog (forwardmotioninc.com) I decided to improve my exhaust at a local shop with a mandrel bent 2 and 1/2" and a free flow muffler. The car has a nice rumble, but NAJ cautions us that the little Mitsubishi Turbo may over-spool without some back pressure. I have not turned up the boost yet.