quick, whats the size of the apexi n1 piping im turboed and i wana build a 3 in downpipe for my greddy kit and dont know if i should build a exhaust while im at it or not?

 

they made two diffrent ones i have a turbo n1 which has a 3in inlet and they have an na one that has a smaller inlet

 

NA is 60mm or 2.36".

 

im building a 2.5 or 3" downpipe(havent decided yet). would it be benifitial to replace the exhaust, meaning,would the catback be hurting performance enough to justify spending the money to upgrade to 3"?this is a dohc zc with a sohc greddy kit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by second edition &raquo;</TD></TR><TR><TD CLASS="quote">im building a 2.5 or 3" downpipe(havent decided yet). would it be benifitial to replace the exhaust, meaning,would the catback be hurting performance enough to justify spending the money to upgrade to 3"?this is a dohc zc with a sohc greddy kit.</TD></TR></TABLE>

At 10psi with the Apex'i N1 N/A catback (the 2.36" one) I made 300whp on a stock GSR, just an idea..

 

ya it wont kill you to stay 60mm. 300hp is a lot compared to how far everyone else pushes them. At that point $350 for a 3" would make sense to me. if your making 200 then its just a waste.

 

thats pretty much what i wanted to hear. looks like ill be making a 2.5in downpipe.