What are the concequences with a catless dp???
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If you live in the middle of the Mojave desert, you still have to run a cat. It'* an EPA regulation and a FEDERAL law regardless of whether or not you have emissions testing locally or not.
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From: Enfield, CT
Originally Posted by willwren
If you live in the middle of the Mojave desert, you still have to run a cat. It'* an EPA regulation and a FEDERAL law regardless of whether or not you have emissions testing locally or not.
I think your performance would suffer more from the lack of pressure (BTW back pressure = torque to a certain degree) than you think.
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From: Shiner, Texas
Re: Cat
You really don't want to be without a cat when you go for your yearly inspection, they take one look at it without a cat and won't put an inspection sticker on your car. Some states won't even re-new your registration on your car without a successfully passed emissions test, or a valid inspection sticker.
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From: South Bend, IN (hometown) Indianapolis,IN (college)
Originally Posted by willwren
If you live in the middle of the Mojave desert, you still have to run a cat. It'* an EPA regulation and a FEDERAL law regardless of whether or not you have emissions testing locally or not.
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Re: Cat
Originally Posted by jessie_harbin
You really don't want to be without a cat when you go for your yearly inspection, they take one look at it without a cat and won't put an inspection sticker on your car. Some states won't even re-new your registration on your car without a successfully passed emissions test, or a valid inspection sticker.
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Originally Posted by ELMACHOGERACHO
Originally Posted by willwren
If you live in the middle of the Mojave desert, you still have to run a cat. It'* an EPA regulation and a FEDERAL law regardless of whether or not you have emissions testing locally or not.
Besides being illegal (whether you get caught or not) it'* irresponsible and bad for your car and everyone around you.
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From: Enfield, CT
Re: What are the concequences with a catless dp???
Jess...see bold. Some states don't test or look.
Originally Posted by ELMACHOGERACHO
im going to be swapping an L67 into my 97 se and i have pems and exhaust already and i want to get a down pipe. i heard that high flow cats clog up easy, so i was going to go with a catless dp. (no emmissions testin). what problems would this cause? i have heard conflicting reports. i have heard that no cat and an o2 simulator will effect performance, but my teacher for fuel systems said that the rear o2 only checks to see if the cat'* working properly. will the only problem be the code for no rear o2? if so, cant i get that deleted with a pcm? any info is greatly appreciated.
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From: Shiner, Texas
Re: Cat
All I'm saying is be very carefull. Especially if you plan to travel out of state after you modify your exhaust system. 
Some judges may throw out a ticket if you get one out of state, but some can be real ******** about it. The cops like to title the reasoning on the ticket as "noise violation" or "unsafe vehicle equipment"
Some judges may throw out a ticket if you get one out of state, but some can be real ******** about it. The cops like to title the reasoning on the ticket as "noise violation" or "unsafe vehicle equipment"
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Besides being illegal (whether you get caught or not) it'* irresponsible and bad for your car and everyone around you.
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From: Grand Rapids, Iraq
Why would you want to suffer performance and backpressure problems not to have it. I mean, you said you wanted a DP, but what do you think is going to improve with the cat deleted from the setup, mind you Im asking a performance question, cause without the cat, your exhaust will sound shotty and ugly.