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Misty 05-30-2013 11:07 PM

High flow cats pass emissions
Will high flow cats pass an emission tests? The ones I am looking at (Solo) are not CARB certified. I am in WA state but we have the same emission laws as CA.

kobSS 05-30-2013 11:31 PM

As far as I've heard, the only ones that will most likely pass are the Kooks Green Cats

13FastBlkSS 05-31-2013 12:27 AM

I used to have a Magnaflow high flow cat on my old firebird and it passed inspection.. but I believe if there is no CARB sticker it probably won't pass..

2010SSRSM6 05-31-2013 07:19 AM

No CARB #, no pass.

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RedVborn 05-31-2013 11:16 AM

If ur lucky u might get a lazy tech n just stair at ur camaro the hole time he might nt even look for any E.O numbers cuz ima a smog tech and there r techs out there that don't now what there looking at/for most of the time so ask around smog places n see how old these smog techs , younger techs won't now they'll just get ur car in and out

SPCBA 05-31-2013 11:48 AM

No aftermarket cats have a carb sticker.

Team STILLEN 05-31-2013 02:38 PM

Exactly what everyone said...No Carb #/Sticker, you will not pass!


jag107 06-03-2013 01:03 AM

I didn't see a CARB sticker on my OEM cats either. How would a smog tech know the difference between a hi flow and OEM setup?

caper 06-03-2013 01:28 AM

oem cats = 2 per side. HF cats = 1

GunnyG 06-03-2013 10:36 AM

I thought as of January there was no more sniffer?...:iono: Just an OBD reading.

jag107 06-03-2013 10:57 AM


Originally Posted by caper (Post 6621593)
oem cats = 2 per side. HF cats = 1

Right, but how would they know that? Maybe its in a database when they look up the car?

GunnyG 06-03-2013 02:10 PM

Just read the "new" visual inspection criteria...cats must be in original configuration with the same number as OE unless CARB approved. High-flows = no goes!

JewelSS 06-03-2013 02:15 PM

You should be good for a few years and by then it depends on the place you go but definitely ask around before you go to a random shop. Most shops if busy wont take the time look unless your running Longtubes and no mufflers, to obvious....

jag107 06-03-2013 09:58 PM

Can you fail with no mufflers? Do mufflers affect the emissions in any way?

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