Ok i wana order a 4-1 JDM itr header...Now i already have an Apexi n1 catback...2.36"

What should i buy to replace the stock cat...high flow? test pipe? and where!?

also, would this create and kind of bottleneck?

 

SMS Products carsound cat (PM: SMSP)

yes

 

guess i shoulda just pm'd u lol

ok then thanks again

 

keep the stock cat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94BlackCivicEX &raquo;</TD></TR><TR><TD CLASS="quote">guess i shoulda just pm'd u lol

ok then thanks again </TD></TR></TABLE>

lol dude, you have no clue how many people do that. My instant message history is like 2 pages now.

If you can get away with it a test pipe works pretty good. (www.testpipes.com - gotta call them)
However, a lot of people will agree that the Carsound Cat flows about just as good as almost having no cat at all.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bigwig &raquo;</TD></TR><TR><TD CLASS="quote">keep the stock cat.</TD></TR></TABLE>

stock cat will not work with the 2.5" collector.

 

buy a $10 reducer

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by P1mpSlap &raquo;</TD></TR><TR><TD CLASS="quote">stock cat will not work with the 2.5" collector.</TD></TR></TABLE>

And even if it did fit (or was modified to fit), it's still a tiny, poor flowing, major bottle-neck in the sytem.

 

hit up dave at SMSP for a nice high flow carsound cat. tell him what car you driving year make and model, which header your using and what exhaust you have. he should be able to make you somthing.

 

get a carsound cat