sirux

I heard I should get a high flow cat since I'm going with the air intake/header/performance exhaust..

Any ideas where I could pick one up for my 99 honda civic si.

spike

The same place you can get the I/H/E

D.T.P

lol ditto..you can even go to like crappy tire or part source and get magnaflow highflow cat. 80$ if im not mistaken?

sirux

Will it be capable of passing a e-test? hah

subsonic-civic

iTrader: (2)

yes. but they're not direct bolt on. the $80 ones are universal fit.
you'll need a hole for the o2 unless ur obd1
you'll need flanges and pipes fabricated and welded on.

all in all it'll cost about the same price as if u bought a car specific one.. which go for $200+

i know cause i broke a baffle inside my cat, and was gonna replace my cat with one of them universal $80 high flow magnaflow's. but when i brought it to my friend's shop he told me it'll take a lot more time to put it on.

subsonic-civic

iTrader: (2)

if it says it's complaint, it should pass. unless there's something else that's not enabling you to pass the e-test.

MPR

Magna flow does make a universal high flow cat WITH the O2 bung in it. Have to look on their website for the part number. It will be between $75 and $80. Get th part number, go to crapy and have them order it for you. Thats what I'm doing with my custom 2.5" exhaust build.

Will it pass e-test? Yes it will.

The other question you didn't ask which may be a factor is will it throw a CEL? It may. To remedy this, google "spark plug non-fouler O2 sensor fix". It's an $8 part that will prevent a CEL (check engine light).