Pros/cons of cutting out one set of cats?

[charlie]

I was thinking of letting my local muffler shop replace my cats with 1 set of high flow cats.
How will this affect the smog test? Will it still pass inspection?
It's a 99

Thanks
Charlie

[Chris94L]

Should pass, since its OBD2, all they do is plug into the computer and test for codes. On your truck, because of how it looks, they "might" actually perform a visual, but since there would be cats on it, it would pass. I have a Bassani mid-pipe on mine with their high flow cats on it, and I have to do the sniffer emissions and it passed.

[BC Lightning]

had gutted hi flow cats on my old exhaust setup never failed emissions, but I also had the rear 02's turned off

[charlie]

Should pass, since its OBD2, all they do is plug into the computer and test for codes. On your truck, because of how it looks, they "might" actually perform a visual, but since there would be cats on it, it would pass. I have a Bassani mid-pipe on mine with their high flow cats on it, and I have to do the sniffer emissions and it passed.

LOL I would like to see some one crawl under it and look!
Charlie

[coors2003]

mine doesnt have cat at all, i have headders and bassani sraight pipes, but it has o2s on it and i have no codes showing i wonder if it will pass?

[Chris94L]

mine doesnt have cat at all, i have headders and bassani sraight pipes, but it has o2s on it and i have no codes showing i wonder if it will pass?
I doubt it, on vehicles older than 96 they perform a dyno "sniffer" test which takes readings from the tailpipe.

[coors2003]

they will only get to sniff one side since i have true duals from the headers all the way back, mine has current insp and it came with the insp report, so who knows what they did!:hammer:

[projlightning]

they will only get to sniff one side since i have true duals from the headers all the way back, mine has current insp and it came with the insp report, so who knows what they did!:hammer:

Yea I doubt it'll pass... my 93L didn't. I have Hedman shorties straight to dual 1 chamber flowmasters dumped (no cats). I usually pay between $80 to $100 for my inspection.

[BC Lightning]

Yea I doubt it'll pass... my 93L didn't. I have Hedman shorties straight to dual 1 chamber flowmasters dumped (no cats). I usually pay between $80 to $100 for my inspection.

But then again since your talking about your 1993 L yours has to be sniff tested because it is 1996 or earlier, his is a 1999 L, I had no cats on mine, and had the rear 02's turned off so no codes were thrown, when they pluged the computer into the OBD2 port it passed every time

[PoorSvtman]

they will only get to sniff one side since i have true duals from the headers all the way back, mine has current insp and it came with the insp report, so who knows what they did!:hammer:

IF they look at see it had true duals they have an adapter for the sniffer... But dunno what year your truck is...

96 + if you have no codes you will pass, you can have a few codes and still pass tho...Theres alot of ways around it. If you have a problem i got a inpsection connection again

[L8 APEX]

I leave the cats alone unless installing headers then I leave them off.

[coors2003]

yea mine is a 93L so it will go thru the sniffer i have till around aug of next year, i guess ill look for the hook up:beer: