LT1-LT4 Modifications 1993-97 Gen II Small Block V8

need to pass emissions

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Old Apr 4, 2006 | 04:22 PM
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Hey guys, i really need to pass emissions come august. do these hi-flow cats bring down the toxins to the levels needed? I have heard that to pass you need like 2 of the hi-flows. If that is so i guess i'll have to get a regular one because i need it to pass ect. and i havent found someone that could "help" me for a decent price. how much hp would I lose going to one from a muffler shop or so? will i gain any back putting my cut-out after it?
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Old Apr 5, 2006 | 08:18 AM
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anybody?
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Old Apr 5, 2006 | 08:29 AM
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What state are you in, most don't test 1995 and back...
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Old Apr 5, 2006 | 10:11 AM
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tx, i have to pass the sniffer test. i still have all the egr and air stuff, just no cat
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Old Apr 5, 2006 | 11:04 AM
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I have an EGR and a factory CAT, no AIR stuff. When I put on my longtubes, I am blocking the EGR because they are racing Headers. I am still keeping the Cat, because my exhaust is crazy loud even with it in. I'm in Arkansas, no inspection of any kind though ....
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Old Apr 6, 2006 | 08:39 PM
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My high flow magnaflow cat passed emissions, I had to go back and change the 02 sensors because it failed with the new cat the first time around.
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Old Apr 6, 2006 | 09:56 PM
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Just put a stock cat on and you should pass. you also can get a muffler shop to put bolts on either side of the cat so you can take it off and put on a straight pipe after the emissions. I have heard of a few people who do that to get around emissions.
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Old Apr 6, 2006 | 09:57 PM
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you think my longtubes will pass? i hear they are harder to pass
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Old Apr 7, 2006 | 08:28 AM
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come on man your in texas...hell all they check out threr is if you lights and horn works. i was born and raised in S.A. my whole life and never once had a sniffer hooked up to my cars. believe me just about all shops out there will hook you up.
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Old Apr 7, 2006 | 08:30 AM
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Originally Posted by imnotplutonium
you think my longtubes will pass? i hear they are harder to pass
i passed with a small cam, long tubes and dual high flow cats without an issue. i even had to pass the dyno type emission.


you shouldnt have a problem once you put cats on
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Old Apr 7, 2006 | 09:37 AM
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Originally Posted by chris77
come on man your in texas...hell all they check out threr is if you lights and horn works. i was born and raised in S.A. my whole life and never once had a sniffer hooked up to my cars. believe me just about all shops out there will hook you up.

well come over to harris county then. they are getting pretty strict. some places dont do it like brazos county and i guess yours, but until i move out of harris county for good then i have to pass
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Old Apr 7, 2006 | 11:01 AM
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Originally Posted by 95-CAMARO-V8
Just put a stock cat on and you should pass. you also can get a muffler shop to put bolts on either side of the cat so you can take it off and put on a straight pipe after the emissions. I have heard of a few people who do that to get around emissions.
That's what I did on my '94. Unfortunatly my '97 has two cats and they're in wierd spots lol
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Old Apr 7, 2006 | 12:11 PM
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yea i think that sounds like the best idea. i'll have someone fab that up for me.
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