Forwarning, sometimes the neo's have a fuel pump problem. Have them do make ready before you get there.
There is a pretty good mod for the pipes. I found it on the main board. All it is, is cutting the thing open, removing the baffles, moving the catylitic, and porting the tail pipe. Sounds pretty good, really deep, kinda loud but not obnoxious.
Now if I could only get a 6th gear.