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Old 02-18-2010, 02:10 AM   #1
Scooby Newbie
Member#: 44399
Join Date: Sep 2003
Location: Seattle
2006 WRX Ltd
Steel Grey

Default Stage 2 Exhaust that will pass WA smog check

I have a 2006 WRX with an Accessport running Stage 1 maps. My car will be coming due for Washington State smog control check in the next year or two. I want to go to Stage 2 but do not want to change exhaust parts just to pass the check. I am aware that just having changed an exhaust part technically takes me out of compliance, but I will risk that as long as not too evident.

Does anyone have experience with a Stage 2 mod that when switched back to factory base map will pass the WA test? I am hoping a high flow cat downpipe will do it, but I can't find any good evidence that it will. Any Subaru performance parts that will do it?

Thanks for any and all advice on this one.

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Old 02-19-2010, 01:18 AM   #2
Scooby Specialist
Member#: 198633
Join Date: Dec 2008
Chapter/Region: NESIC
Location: MA
2004 WRX


What kind of check is it? Is it just a visual thing? Do they simply check readiness? Do they actually sniff your tail pipe? Posting in your local forum where people are familiar with the procedure may be a better option. Generally speaking, however, a stage 2 reflash will not stop the readiness monitors from reporting ready.
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Old 02-19-2010, 09:44 PM   #3
Scooby Guru
Member#: 171948
Join Date: Feb 2008
Chapter/Region: Tri-State
Location: new york
08 wrx stg3 vf52
14 legacy, 11 fozzy


i just had my yearly inspection done here in new york .im stage 2 with the perrin catted downpipe. i passed no problem. they test emmisions here too.
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Old 02-26-2010, 06:07 PM   #4
Member#: 186665
Join Date: Aug 2008
Chapter/Region: NWIC
Location: Hillsboro, OR
2014 BRZ


You should be good, when DEQ plugs in their OBD reader, you won't have any codes with the AP. You don't even need to change the map, just leave the stage 2 map on there.
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