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Are high flow cats legal?

i am in NJ and was wondering if HFCs are street legal. i know they free up a lot of power but i wouldnt want to deal with the hassle

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Old 10-24-2009, 06:13 PM   #1 (permalink)
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Default Are high flow cats legal?

i am in NJ and was wondering if HFCs are street legal. i know they free up a lot of power but i wouldnt want to deal with the hassle of getting it inspected
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Old 10-24-2009, 06:16 PM   #2 (permalink)
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Originally Posted by fairladyZ34 View Post
i am in NJ and was wondering if HFCs are street legal. i know they free up a lot of power but i wouldnt want to deal with the hassle of getting it inspected
I think it depends on the exhaust AND the state. If you read some of the manufacturer's descriptions, they'll say "49 state compliant" or whatever, which I"m assuming only excludes California.
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Old 10-24-2009, 06:18 PM   #3 (permalink)
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usually, they are legal, however....
It is against federal law to replace your cats unless the original ones are damaged.
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Old 10-24-2009, 08:19 PM   #4 (permalink)
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iirc they are illegal in ny/nj
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Old 10-25-2009, 01:42 AM   #5 (permalink)
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HFC's look just like stock Cats minus the heat shield, you will pass any visual inspection, so regardless of legality, as long as the car meets emissions, which it will, you'll be just fine. Now go get some
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Old 10-25-2009, 01:43 AM   #6 (permalink)
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Originally Posted by Mike View Post
usually, they are legal, however....
It is against federal law to replace your cats unless the original ones are damaged.
I guess it'd be wirthwhile to drill a hole through the original cats...lol

That or pour some old engine oil in the engine side....
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Old 10-25-2009, 01:48 AM   #7 (permalink)
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speaking of the original cats, have any of you actually cut one open? Jesuchristo, no wonder the HFC's unlock so much power.
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Old 10-25-2009, 02:01 AM   #8 (permalink)
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speaking of the original cats, have any of you actually cut one open? Jesuchristo, no wonder the HFC's unlock so much power.
I highly recommend NOT cutting one open! asbestos is present.
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Old 10-25-2009, 02:41 AM   #9 (permalink)
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I highly recommend NOT cutting one open! asbestos is present.
ohh, that was the stuff I hastily scraped into a neat line with my razor and snorted, damn, thought it was the good stuff.
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Old 10-25-2009, 03:04 AM   #10 (permalink)
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ohh, that was the stuff I hastily scraped into a neat line with my razor and snorted, damn, thought it was the good stuff.
having people exposed to asbestos isn't a joke! it was just an alert to be careful.
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Old 10-25-2009, 03:13 AM   #11 (permalink)
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not legal in cali unless they are stamped with a carb exemption tag
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Old 10-25-2009, 05:29 PM   #12 (permalink)
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i gutted the cats on my other car, a honda accord with 80k miles and it increased my gas mileage alot, it also allowed the intake and cbe to function a bit better. ill prob be doing exhaust in the spring, im gonna try to do it all one shot hopefully headers back!
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Old 10-25-2009, 07:12 PM   #13 (permalink)
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Originally Posted by Mike View Post
usually, they are legal, however....
It is against federal law to replace your cats unless the original ones are damaged.
As Mike stated, replacing the stock cats are illeagal if they are not damaged - there is also a 10K federal fine that goes along with replacing the stocking cats if they're are not damaged. The good thing is no one cares so you are fine.
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Old 10-25-2009, 07:18 PM   #14 (permalink)
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i always wondered how they could judge if the cats were damaged. would they make you prove that the cats were broke by keeping the old ones for proof?
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Old 10-25-2009, 07:20 PM   #15 (permalink)
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i always wondered how they could judge if the cats were damaged. would they make you prove that the cats were broke by keeping the old ones for proof?
How can they force you to keep something broken?
Only way I can see it being a problem is if you are caught in the act of changing the cats on your personal property.
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