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Old 11-22-2012, 01:44 PM   #1
RallyBot 6.0
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Member#: 337195
Join Date: Nov 2012
Chapter/Region: NWIC
Location: MT. HOOD Vancouver, WA
Vehicle:
2002 WRX
Maroon/black

Default full exhaust combo - pass emissions NORTH WEST?

so i just bought an 02 rex. got an exhaust leak at the 0 ring @ cat and also a leak @ my uppipe, its cracked. im looking to buy an up pipe, downpipe, and full cat back. i have a couple questions..

Can i go 3" downpipe back to 3" full exhaust with no other mods other then an intake and bov? and still run ok?
Do u NEED all the cats to pass emissions? if i can get by using a non catted up pipe and down pipe it would save me some cash.

if i got catted ill buy an invidia, non catted ill go with the erz. want both bungs so i can run wideband in the future. dont know which up pipe to go with, external wastegate? or normal.

i will need to pass deq in washington. i know there has been alot of debate over this stuff i just havnt found any answers to what pertains to me. thanks.
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Old 11-22-2012, 03:36 PM   #2
corvallisbattery
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Chapter/Region: NWIC
Location: Corvallis, OR
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'05 WRX
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Dude seriously.. .you clearly made no effort to become knowledgeable on the subject. Quit wasting my data plan on stupid questions and use the search button
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Old 11-22-2012, 03:42 PM   #3
fxt05
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Chapter/Region: NWIC
Location: Vancouver, WA
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Stop wasting your data plan posting dumb responses. If you don't like a thread just move along.

Sorry op I have nothing to contribute to your question.
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Old 11-22-2012, 04:51 PM   #4
Viral E
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Join Date: Mar 2010
Chapter/Region: RMIC
Location: Montana + Indiana
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2002 Impreza WRX
WRB

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FWIH, you can run with only one normal Cat or two high-flow Cats and still pass emissions. Run your car a little hard before the emissions test. I hear getting the converters a little over normal operating temp helps with passing HC section of the test. You should remove the cat in the uppipe anyways. F*ck emissions, save your turbo.

Also, Seafoam in the gas tank is an old trick used by truck owners. My friend successfully lowered his emissions on his dodge using a can of Seafoam (at least according to the test station he went to).

Lastly, I don't know how much this helps, but somebody told me if you tune your cruising load a little leaner you can help lower both HC% and CO%
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Old 11-23-2012, 04:23 AM   #5
token85
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Chapter/Region: International
Location: spangdahlem area
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2002 02 bug eye
05 blob eye

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when i lived in the NW all they did was a OB-II check, to make sure you didnt have any cells. i ran a full 3 inch no cats never had a problem. You just going to have to have some one delete a line out of your ecu so you stop getting a cell for no cats, or just the the cell delete plug that goes into the DP. search the NW chapter its in there.
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Old 11-23-2012, 08:48 AM   #6
cmiovino
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Chapter/Region: MAIC
Location: Pittsburgh, PA
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2004 WRX Premium
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FYI, keep in mind you do need to get some sort of tune to run the downpipe safely. Well, 2002's can get away without it... but I'd still highly suggest getting one, even if it's just running the Cobb stage 2 MAP.

As far as emissions, look into what is legal even in your county. I know here is Pittsburgh, you have to be catted (visual check) and they check for CELs. Up north a hour, you can run catless no problem. All depends where the car is registered.
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Old 11-23-2012, 09:50 AM   #7
Amazing Asian
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If you live in kitsap county, we do no emissions testing. It all depends on what county your in. I run a full catless uppipe/downpipe.
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Old 11-23-2012, 10:14 AM   #8
rustmonkey
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Full invidia catless exhaust and love it in Kitsap county!
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Old 11-23-2012, 10:40 AM   #9
Pakin
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MY05 Forester 257X

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Full catless on both cars, one does the tail sniffer and the other on OBD-II, both pass in SnoCo.

With your OBD-II car, you can tune it and have it pass. I don't think any county in WA has any scrutinizing visual inspections (eg: they really look underneath to see a cat).
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Old 11-23-2012, 10:50 AM   #10
hillsboro
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11 STI
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http://forums.nasioc.com/forums/show...ight=emissions

http://forums.nasioc.com/forums/show...ight=emissions

http://forums.nasioc.com/forums/show...ight=emissions

A little effort goes a long way around here. This has been thoroughly covered, along with what kind of (blank) should I get/buy.

I ran fully cat less on my 02 and it was fine. If you want to get the most out of the parts you purchase get a tune. With out one you will need to LOOK up the CEL fixes for the up pipe and down pipe.

Get to a meet ASAP.

Last edited by hillsboro; 11-23-2012 at 11:02 AM.
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Old 11-23-2012, 10:58 AM   #11
Crazymonk88
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05 Legacy
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Quote:
Originally Posted by hillsboro
http://forums.nasioc.com/forums/show...ight=emissions

http://forums.nasioc.com/forums/show...ight=emissions

http://forums.nasioc.com/forums/show...ight=emissions

A little effort goes a long way around here. This has been thoroughly covered, along with what kind of (blank) should I get/by.
Yay! Intelligence.........
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Old 11-23-2012, 12:14 PM   #12
Fade2black02
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Chapter/Region: NWIC
Location: Arlington, WA
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2010 STI
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Many cities don't require emissions testing, just drive there and renew. No questions asked because if the government is good for one, and one thing only...it's they never say no to extra tax money.

Arlington and Enumclaw in WA, to name a couple. With a little research you can find several more in your area I'd imagine as well (it wasn't specified where you live).
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