ochsy03

i have a 99 civic si with a drag gen III turbo and apexi N1 exhaust w/stock cat...i want to take out my cat and put in a test pipe or straight pipe...the places i have aksed wont do it cause its illegal....how hard is it to do? does it just bolt right in or would i need to weld it?

hatchling37

If you get one that fits, then it's just plug and play. Should be a direct bolt-in. Three nuts on either side and pull out the cat and put the pipe in. Be prepared to get CEL's though.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ochsy03 &raquo;</TD></TR><TR><TD CLASS="quote">ithe places i have aksed wont do it cause its illegal</TD></TR></TABLE> That should tell you something...

modedicebox

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hatchling37 &raquo;</TD></TR><TR><TD CLASS="quote">If you get one that fits, then it's just plug and play. Should be a direct bolt-in. Three nuts on either side and pull out the cat and put the pipe in. Be prepared to get CEL's though.
That should tell you something...</TD></TR></TABLE>

No cels if you retain your o2 sensor with a bung that is welded to the pipe. My test pipe is basically just a resonator with flanges. Im sure if you cant get one somebody is selling one on here.

EJ8VTEC

im in need also soon enough

realBIG

watch out for fireballls and horrible smells

TeamNextGenChris

you can get a direct bolt in replacement off Ebay.
keep in mind that your car won't pass a smog test with it,and cops can pretty easily recognize it's not an actual cat if they look at it.two things to consider if it applies in your area.
Chris

TherealVTECZILLA

I take it you did not
put on your Turbo kit


It's 5 bolts I think you can do it,if not SELL your
car and buy a KiA

ochsy03

no smog test in MN

Aphelion

There's a reason it's illegal - it's very harmful to the environment. I know this isn't going to change your mind, but at least other forum members who are thinking about it may reconsider.

http://auto.howstuffworks.com/...1.htm

acid rain and smog, worth giving your car five more horsepower?

# Hydrocarbons or volatile organic compounds (VOCs) - produced mostly from unburned fuel that evaporates

Sunlight breaks these down to form oxidants, which react with oxides of nitrogen to cause ground level ozone (O3), a major component of smog.

# Nitrogen oxides (NO and NO2, together called NOx) - contributes to smog and acid rain, and also causes irritation to human mucus membranes

mountaindewguy

just get a good high flow cat. respective companies such as magnaflow make decent ones. it'll give you maybe a couple horsepower, still legal, wont stink, or fireballs