alllooksnnogo

just wondering. When I did my swap last summer, I left my stock cat in. I have the jdm 2.5" inlet pipe attached to the cat and a 2 1/4" exaust on the other end. Would it be more efficient if I were to replace the cat......say with a 2.5 or 2 1/4"? Would this benifit me?

EJcivic02

if its your stock cat from you EX, then id dump it.

catco, high-flow, ebay, or straight pipe all works. Your exhaust tone will definetly change with a straight pipe, but as for power gains, nothing real drastic.

EDIT: be careful with emission laws if where you live requires that.

alllooksnnogo

Thanks EJcivic02, everybody else agree??

FromTheBottom

i'd definitely complete the free flow setup by upgrading the cat. gains won't be much, but it will replace the stock cat bottleneck.

supermac88

I hope you like your car loud I have straight pipe from my header back with an N1 wannabe muffle and it is friggen loud as hell man

Civic2Scooby

get a 2.5 carsound cat, the tone wont change all that drastically but it will defenitely help your car breathe a lot better, also you will be putting in a brand spankin new cat and getting rid of a cat that I bet is pretty clogged up.

Jkan2001

test pipe and know someone that will pass you on inspection

ragerized

like someone else said on this board, you should be required to sit in front of your exhaust for an hour a day, if you constantly run a test pipe. cacks.

Jkan2001

nah i think hippies like you with stock cats can suck down my exhaust fumes at the track from about 6 cars back h:

or perhaps you could go hug a tree

illicon2003

shut up. some of us are concerned with making our cars fast. I guess you're content with "gsr tranny, s2k shift knob"