I finally replaced my stock straight piped exhaust with a 4". Currently I just have the 4" downpipe and a 5' section of straight 4" with no muffler and no tailpipe. The sound is 10X better than straight 3", much better tone and sound and much more turbo whistle at idle. Anybody that's hesitant to do their exhaust, just do it! I'm still debating on just turning it down where it's at or running it out in front of of the tire on the passenger side, I know I don't want a full tailpipe though, I don't care for that look.