[Miata2nv]

I am using a Apex N1 turbo with custom 2.5in piping. Its not that loud but that could be because I have a turbo. Heres a video:

http://s49.photobucket.com/albums/f295/miata2nv/miata/?action=view&current=Picture019.flv

 

[Miata2nv]

It pretty free flowing. It does not spool that much faster with open downpipe.