stop bein cheap, get a GReddy EVO, or EVO2 system....u'll be glad you did...or if u really wanna be cheap..get an apexi N1 muffler or some other rear section and go to a muffler shop and get the piping done there...my brother paid 195 for his N1, 90 for the piping and install...only thing is, the dumbass ordered the Turbo N1 with the 3.5" inlet and 4" outlet....2.25" piping, they had to weld an adapter on to make it fit....loookss gooooood, but his car idles high so his shit is LOUUUUDDDD...and the fact that the muffler is so wide open doesn't help either.... i just spent the 500 for the GReddy EVO on the ol' 6th gen....it's worth it, just do it