03civic247

Well a 01 4 door civic stock headers and catilic converter fit a 03 2 door civic?

gearbox

iTrader: (95)

only if they are both the same like LX-LX or EX-EX. an EX setup will not fit LX. and 01-03 vs 04-05 has different oxygen sensors (both up and downstream) so be sure you use your originals. in your case the 01-03 is narrowband, 04-05 is wideband.

03civic247

Thanks for the help!..guess I can't use my friends headers n cat to smog my car cuz I got racing headers with no cat

gearbox

iTrader: (95)

yeah in cali, you are gonna need a cat for sure. there are ways to bypass with a sensor mod but you will fail the visual when they look under and dont see anything but pipe.

03civic247

Well they don't look under neath my car..how would I be able to bypass it?

lazlong

https://www.civicforums.com/forums/2...on-w-pics.html

lowlife9

does your header have bung holes ?? get this if they do because that diy wont fit because the alternater gets in the way this is what i use http://www.robearracing.com/pd-megan...or-cel-fix.cfm
so you have been just driving around with the cell light on ???

03civic247

Ya basically

DerekxxCore

I don't know how it is in cali but I'm from ny and if they look under your car and see pipe you get torn a new *******.

gearbox

iTrader: (95)

cali is one of the toughest places to pass. they have all sorts of rules that nobody else even thinks of. altho, even in NV here they check over the car and under it pretty well to make sure there are no mods to emissions system.

03civic247

O ya..well I'm trying to smog before I move to Vegas this week cuz I don't know anyone up there with headers n cat