Here is a sound clip, but I believe this member is using 2.25" piping.
http://www.sr20forum.com/1956507-post44.html
Here is a video I made a while back for someone that wanted a sound clip. I'm using a cheap digi cam, but you get the idea. The intake pretty much drowns out the exhaust, but I will try to get an outside the car video sometime.
http://videos.streetfire.net/video/c77e8846-b8b7-4b5b-bf45-997d014f09e6.htm[/url]