/begin newb-mode
what does NA stand for? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='

'> I dont want to keep the stock look, I just want the best exhaust for my 240 in the 500ish price range.
/end newb-mode
is the HKS or the n1 dual best for what im looking for? (btw: I don't plan on getting a turbo any time soon)