Emissions exempt

[Firehawk24]

I just went to have my emissions tested and was told that the h2 is now exempt from testing(why? I have no idea) question, would I gain any performance by eliminating the converter?

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[abearden]

http://www.epa.state.il.us/air/vim/
Apparently the law changed recently exempting a bunch of 2007 and prior vehicles. H2's GVWR of 8600 exempts it.

 

[Firehawk24]

Interesting, thanks!

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[SuperBuickGuy]

removing the cat is a violation of federal law, and like about anything else - if a cop wants to be an adz, can impound your car because it's not legal to be on a public road.

with that said, removing the cats doesn't really create enough less backpressure to help with power or mpg. You can accomplish the same reduction (and without the pretty dash lights) by removing the rest of the exhaust - that actually creates more backpressure than the cats.

 

[justin94tt]

If I were you I'd be saving for a diesel swap knowing that they aren't checking emissions.

 

[twinmill28]

There's a muffler place in Calgary, Canada that removes the cats and re-tunes the computer to make everything happy. I heard an 08 deuce right after it was done and it was louder than hell. With the tune and cats removed its supposed to improve performance.
We're exempt from emissions here in Florida and I can't think of any logical reason to remove my cats, seems the engine is pretty happy in their as it is, and I'm tired of screwing things up for the worse on my vehicles thinking it makes them cooler in some way.

 

[Savethereef]

I wonder if California changed too?

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[Fish]

I wonder if California changed too?

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that would be nice but I highly doubt it

 

[Zach]

I wonder if California changed too?

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I would say no. Aftermarket cats are 49 state. They exclude Cali. Would be nice. But the 2 passed smog. A cat and O2 sensor later

 

[n0useforaname]

I wonder if California changed too?

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They did. Now you need 2 cats, a exhaust filter, special fuel, and Arnold gets to inspect every Hummer once a year.

 

[Caraddict]

Anyone know if t hey are exempt in CT?

 

[MaxPF]

Keep the cats. They don't significantly impact performance, and gas engines without 'em are stinky

 

[Mb30sdl]

Keep the cats. They don't significantly impact performance, and gas engines without 'em are stinky

X2 GMC smells a lot better with cats.