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Old 10-08-2008, 01:05 PM   #1 (permalink)
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CEL with no cat?
I have looked around a little and cant find a straight answer on whether or not if i delete the cat on my exhaust if i will throw a CEL because the second O2 sensor is not reading a change in the exhaust in what would be "after the cat". Has anyone ran a straight through no cat exhaust, and if you have did you run into any issues. I dont have to comply with emissions because i am registered in AZ so that isnt a problem. but i dont want to look at a friggin CEL because i dont have a cat. I am looking to delete my cat and all of the additional mufflers with the exception of the ones out back. Please help me out.
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Old 10-08-2008, 03:03 PM   #2 (permalink)
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Bump? I guess im gettin no help...
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Old 10-08-2008, 03:26 PM   #3 (permalink)
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Originally Posted by H22A_CD5 View Post
I have looked around a little and cant find a straight answer on whether or not if i delete the cat on my exhaust if i will throw a CEL because the second O2 sensor is not reading a change in the exhaust in what would be "after the cat". Has anyone ran a straight through no cat exhaust, and if you have did you run into any issues. I dont have to comply with emissions because i am registered in AZ so that isnt a problem. but i dont want to look at a friggin CEL because i dont have a cat. I am looking to delete my cat and all of the additional mufflers with the exception of the ones out back. Please help me out.
Can I ask why?

You can run a straight pipe (testpipe) w/ cat-back exhaust, and use a O2 defouler to trick it but not guarantee.

This is just a 4 cylinder car no matter what you did to the exhaust it won't gain you much, plus you are adding pollution to the god damn beautiful earth.
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Old 10-08-2008, 03:50 PM   #4 (permalink)
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Plus you will not gain much more, if any over a high flow cat like a RT bolt-on.
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Old 10-08-2008, 05:32 PM   #5 (permalink)
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Simple answer. Running no cat will throw a cel.
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Old 10-08-2008, 08:05 PM   #6 (permalink)
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If you buy the T1R test pipe, it comes with a defouler which usually prevents the CEL from showing.
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Old 10-08-2008, 09:09 PM   #7 (permalink)
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Quote:
Originally Posted by chuson View Post

This is just a 4 cylinder car no matter what you did to the exhaust it won't gain you much, plus you are adding pollution to the god damn beautiful earth.
lol
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Old 10-08-2008, 09:31 PM   #8 (permalink)
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get a defouler.. they do work... go with a t1r test pipe..

before and after... shows nice gains compared to most bolt ons =] especially on low end.
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Old 10-08-2008, 09:48 PM   #9 (permalink)
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Quote:
Originally Posted by RaCeR4LiFe022 View Post
get a defouler.. they do work... go with a t1r test pipe..

before and after... shows nice gains compared to most bolt ons =] especially on low end.
A high flow cat will do the same too. And he's talking about taking off the CAT + other resonator in between?
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Old 10-08-2008, 10:40 PM   #10 (permalink)
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I just got my T1R in today. Ended up taking it to a local 'quick oil change' place and had them install it for 15 bucks after hours. It came with the defouler and so far I don't have a CEL light. It's deffintiely the way to go.

BTW, this was installed on a race car and not an auto used on public roadways.
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Old 10-08-2008, 10:50 PM   #11 (permalink)
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Quote:
Originally Posted by RaCeR4LiFe022 View Post
get a defouler.. they do work... go with a t1r test pipe..

before and after... shows nice gains compared to most bolt ons =] especially on low end.
Those are some decent numbers... I think i may go with that now, but the only T1R test pipe that i have seen said that it was for JDM cars only.... Is that the one you used, or is there a USDM one out there. Appreciate your post. And thanks for the input everyone.
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Old 10-08-2008, 11:06 PM   #12 (permalink)
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Marcus From Heeltoe has them for our cars. Best price you will find. I belive that he has them in stock thanks to me!

Thanks for the awesome part Marcus!
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Old 10-11-2008, 12:56 PM   #13 (permalink)
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Doing the Pre-muffler and silencer delete this morning and plan on ordering the test pipe this afternoon. Thanks for all your help and input!
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Old 10-15-2008, 02:09 PM   #14 (permalink)
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nice numbers.

t1r test pipe added to my list of "to do" mods.

you guys getting funky smells in the cabin while driving?

anyone in canada running this set-up? i'd like to know if this will pass emissions testing.
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Old 10-15-2008, 04:01 PM   #15 (permalink)
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nice numbers.

t1r test pipe added to my list of "to do" mods.

you guys getting funky smells in the cabin while driving?

anyone in canada running this set-up? i'd like to know if this will pass emissions testing.
I'm pretty sure a test pipe will not pass drive-clean, you'll have to revert to stock for the test.
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