Are high flow cats legal?

fairladyZ34 · 10-24-2009, 06:13 PM

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

Matt · 10-24-2009, 06:16 PM

Quote:

Originally Posted by fairladyZ34

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.

Mike · 10-24-2009, 06:18 PM

usually, they are legal, however....
It is against federal law to replace your cats unless the original ones are damaged.

10-24-2009, 08:19 PM

iirc they are illegal in ny/nj

Red370 · 10-25-2009, 01:42 AM

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

kannibul · 10-25-2009, 01:43 AM

Quote:

Originally Posted by Mike

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....

Red370 · 10-25-2009, 01:48 AM

speaking of the original cats, have any of you actually cut one open? Jesuchristo, no wonder the HFC's unlock so much power.

Trips · 10-25-2009, 02:01 AM

Quote:

Originally Posted by Red370

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.

Red370 · 10-25-2009, 02:41 AM

Quote:

Originally Posted by Triple's

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.

Trips · 10-25-2009, 03:04 AM

Quote:

Originally Posted by Red370

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.

Trips · 10-25-2009, 03:13 AM

not legal in cali unless they are stamped with a carb exemption tag

fairladyZ34 · 10-25-2009, 05:29 PM

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!

Snakebite202 · 10-25-2009, 07:12 PM

Quote:

Originally Posted by Mike

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.

fairladyZ34 · 10-25-2009, 07:18 PM

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?

theDreamer · 10-25-2009, 07:20 PM

Quote:

Originally Posted by fairladyZ34

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.

10-24-2009, 06:13 PM	#1 (permalink)
fairladyZ34 A True Z Fanatic Join Date: Aug 2009 Location: Central NJ Posts: 1,577 Drives: 08 G37S Black M6 Rep Power: 18	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

10-24-2009, 06:18 PM	#3 (permalink)
Mike The370Z.com Sponsor Join Date: Jun 2009 Location: Loganville, GA Posts: 5,944 Drives: 370z Rep Power: 2185	usually, they are legal, however.... It is against federal law to replace your cats unless the original ones are damaged. __________________ NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z Porsche: 93 968 / 23 Macan GTS / 93 968

10-25-2009, 01:42 AM	#5 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 295	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 __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs

10-25-2009, 01:48 AM	#7 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 295	speaking of the original cats, have any of you actually cut one open? Jesuchristo, no wonder the HFC's unlock so much power. __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs

10-25-2009, 03:13 AM	#11 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,728 Drives: 🔰 Rep Power: 10	not legal in cali unless they are stamped with a carb exemption tag __________________

10-24-2009, 08:19 PM	#4 (permalink)
blue660r01 Guest Posts: n/a	iirc they are illegal in ny/nj

10-25-2009, 05:29 PM	#12 (permalink)
fairladyZ34 A True Z Fanatic Join Date: Aug 2009 Location: Central NJ Posts: 1,577 Drives: 08 G37S Black M6 Rep Power: 18	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!

10-25-2009, 07:18 PM	#14 (permalink)
fairladyZ34 A True Z Fanatic Join Date: Aug 2009 Location: Central NJ Posts: 1,577 Drives: 08 G37S Black M6 Rep Power: 18	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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