</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>
Quote (burgy240 @ Dec. 09 2002,5:37)</td></tr><tr><td id="QUOTE">I have a topspeed 3" straight through exhaust and an Apexi N1 dual. I like the sound and looks better from the N1 but the performance with the SR should be better from the Topspeed single. I think the piping is only 2.75 on the N1 dual and my question is if I stay with the N1 dual how much power am I sacrificing and how bad would teh topspeed 3" be on the KA? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cry.gif" border="0" valign="absmiddle" alt='
'> Thanks, and no I won't sell the N1 dual I have 2 s14's and need 2 exhausts.</td></tr></table><span id='postcolor'>
Ummm, I'm gonna go ahead and say that there is no difference between one 80mm pipe and one that splits into 2 60mm pipes. They will flow roughly the same. The most crucial point on a turbo exhaust system is the downpipe, the cat, and the midpipe, anyway. By the time the flow is at the rear, most of the thermal energy is gone, it's cooled down alot, and doesn't need as much diameter (low temp = more dense = smaller).
But, I'm sure some tool <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/alien.gif" border="0" valign="absmiddle" alt=':alien:'> will come over here and tell me why the 3" single is better. I'm saying they are totally equal and the only difference is LOOKS.:thumbsup:
Now, if the single were like the GT Spec (95mm), that would be a different story, of course.
Eric