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View Full Version : Will those ebay high flow cats pass smog?

LennyP
10-14-2006, 12:55 AM
I see high flow cats on ebay dirt cheap. Thing is they don't look very convincing. Would they actually get by for people who have to do emmisions?
transzex
10-14-2006, 01:08 AM
depends, here in oHIo I passed without the factory cat due to proper tuning.

High Flow cat MIGHT give you 1-1.5 hp, not worth it.
LennyP
10-14-2006, 01:15 AM
i was actually asking because they have those complete header back exhaust systems, including hi-flow cat, for a few hundred dollars. I need a new exhaust, and I could use a new header, so why not get the whole thing?
LennyP
10-19-2006, 12:12 AM
My biggest concern is from a visual standpoint if they put the mirror under your car.
JaredKaragen
10-19-2006, 01:32 AM
well, I would say no... I think it's actually just a resonater called a cat if im not mistaken...

go to a muff shop and get a catco Hi-Flo cat.... that will give you what you are looking for...

only problem is aftermarket high-flo cats tend to burn out.. quickly if run too lean/rich for too long.
ryan89crx
10-19-2006, 07:13 AM
those "high-flow cats" are just resonators with convertor flanges on them

tell me if you think they will do the same job as a true cat...
93 red ls
10-19-2006, 07:34 AM
depends, here in oHIo I passed without the factory cat due to proper tuning.

High Flow cat MIGHT give you 1-1.5 hp, not worth it.

yea but now us ohioans aint gots ta worry bout smog fuck em'
lowcrx
10-19-2006, 08:33 AM
my brother lives in ohio and they don't have to worry about inspection or any to that stuff....you guys are lucky...
JaredKaragen
10-19-2006, 06:23 PM
those "high-flow cats" are just resonators with convertor flanges on them

The Ebay ones... yeah.... the real ones you would get at a qualified muffler shop do atually have a catalyst in them...

If you look straight through them, the real-hi-flo cats look like they have a bunch of mesh screens across the inside: Those screens are coated with the catalyst... that's why they go out soo quick.

I would say: Don't get it... it's a waste of your $$$... I would rather spend that cash on a real cat, not a resonator posing as a cat.
Rexinre
10-19-2006, 06:24 PM
no.
ryan89crx
10-19-2006, 06:27 PM
The Ebay ones... yeah.... the real ones you would get at a qualified muffler shop do atually have a catalyst in them...oh, i fully understand that. BUT...
I see high flow cats on ebay dirt cheap.
JaredKaragen
10-19-2006, 06:32 PM
YEah... but what are the odds that they actually have a catalyst in them??

The catalyst isn't cheap, and there are specific state/federal regulations about distribution/processing/recycling of the material.... ever wonder why it's illegal to sell a used CAT in Cali from a junk yard? same idea there.

They are just poser cats.... I seriously SERIOUSLY doubt they have a catalyst in them....

I would say if it ain't a brand name that is KNOWN for selling catalytic converters (like Catco) then don't get it.... it's a waste of $$$ for no emissions control.
zexaccord
10-19-2006, 06:45 PM
if it actually a REAL hgihflow cat and not resonator you won't have a problem, mine almost passes w/o a cat on it!
gpny
10-20-2006, 09:19 AM
Catco's are 40$ on ebay...
SMSP used to have high flow cats that would also work...

I need to check my cat every few months and see if it's ok. I haven't had issues so far...