Apex-i N1 works and sounds great

 

Tusdo full catback run for $200 and under shipped, Megan full catback go for $350 maybe a little less or more shipped on ebay. Don't get an Apexi N1 or greddy when you have an NA. About 5 hp for $500 isn't worth it..

 

Meh... it all depens on what your skills are and what equipment you have acess to.
im in the same place as you are, but i have the skill and the equipment available to since im a tech and workin at a large dealership!
at this point im lookin at building a complete 3" exhaust for my gst...
and to take it a step further
im gonna use a warlock muffler withab electriccutout at the warlocks cut-out point which will open under WOT.
thats just a rough idea...
but heres a couple of links :P

http://www.quicktimeperformance.com/QTEC/index.php- cut out

http://www.holley.com/types.asp?type=399- warlock muffler i was talking about

also was gonna use dual 3" exhaust tips

 

Dont sound bad to me. Cat back + test pipe. A header will make it have a little deeper sound than in this vid.
http://youtube.com/watch?v=pfpGuRfXpRk

 

ugh....thats an annoying lil fart can[:@]

 

420a no cat
http://youtube.com/watch?v=CFwqVjMOCpI

 

sound like a chainsaw thats had been filled with a bad mix of 2 stroke oil and gas...
yikes... [sm=why.gif]