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Aftermarket exhaust system on IS250..how to keep CEL from coming on?

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Old 01-24-13, 01:48 PM   #1
ericgray1
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Default Aftermarket exhaust system on IS250..how to keep CEL from coming on?

So my wife wants me to install an exhaust system on her 2006 Lexus IS250. I am familiar with a lot of aftermarket systems (just not on the IS250). I know a lot of system get rid of the catalytic converters a lot of times or replace them with high flow converters and test pipes. But this car I know needs the cats to make sure the O2 sensors read right. How would we go about making sure her check engine light and VSC light do not come on from installing an exhaust system?

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Eric
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Old 01-24-13, 02:13 PM   #2
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Most people on this forum install mid pipe exhausts which wont cause any O2 sensors from going off or anything like that.
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Old 01-24-13, 03:48 PM   #3
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Hey man , i myself own an 06 AWD lexus is250 and if u own and AWD then you wont be able to find any mid-pipes , only cat-backs .... In my case i baught and installed tanabe catback exbaust. I also eliminated the resonator and the 2 cats before the o2 sensor ( if u didnt know the car has 4 cats ). As long as you dont eliminate the cats in front of the o2 sensor then your CEL wont come on your fine. ( fyi im not sure if the car will pass inspection but hoepfully u have a hookup)
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Old 01-24-13, 03:49 PM   #4
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Most exhausts for our cars are axle backs, which wont cause any issues.

If you want, you can also install midpipes, which just remove the secondary cats (I think Invidia).

I have an exhaust and midpipe combo and never had any issue
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Old 01-24-13, 03:50 PM   #5
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Quote:
Originally Posted by SammyEJ20 View Post
Hey man , i myself own an 06 AWD lexus is250 and if u own and AWD then you wont be able to find any mid-pipes , only cat-backs .... In my case i baught and installed tanabe catback exbaust. I also eliminated the resonator and the 2 cats before the o2 sensor ( if u didnt know the car has 4 cats ). As long as you dont eliminate the cats in front of the o2 sensor then your CEL wont come on your fine. ( fyi im not sure if the car will pass inspection but hoepfully u have a hookup)
I think you mean axle backs. A catback exhaust is a complete exhaust: mufflers, y pipe, midpipe, etc
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Old 01-24-13, 04:39 PM   #6
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No i mean cat-back lol , do you own an AWD or RWD ?
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Old 01-24-13, 04:49 PM   #7
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Quote:
Originally Posted by SammyEJ20 View Post
No i mean cat-back lol , do you own an AWD or RWD ?
What Im trying to say is that the tanabe exhaust you bought is NOT a cat back, its an axle back.

Axle back: mufflers + y pipe

Cat back: above + replaces midpipe

For example, the JoeZ exhaust is a catback
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Old 01-25-13, 07:07 AM   #8
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Oh okay , i understand now my fault lol but yeah sucks that no one makes anything for AWD's
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Old 01-25-13, 08:20 AM   #9
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Quote:
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Oh okay , i understand now my fault lol but yeah sucks that no one makes anything for AWD's
Well the axleback exhausts will fit the AWD, but nobody makes midpipes
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Old 01-25-13, 09:09 AM   #10
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So the invidia midpipes will not fit the AWD models?
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Old 01-25-13, 09:23 AM   #11
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So the invidia midpipes will not fit the AWD models?
Im not 100% sure but Im prett sure it will not fit
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Old 01-25-13, 09:26 AM   #12
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because i just orderd one from one of the venders on here last night. becasue my mid pipe is rusted and has a hole in it and ive got an AWD
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Old 01-25-13, 09:35 AM   #13
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Far as I know there are no aftermarket midpipes that fit AWD.
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Old 01-25-13, 09:35 AM   #14
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because i just orderd one from one of the venders on here last night. becasue my mid pipe is rusted and has a hole in it and ive got an AWD
Damn dude, search around the forums and make sure because like I said, Im about 80% sure it wont fit.
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Old 01-25-13, 09:45 AM   #15
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im reading where the mid pipe can be modded for it but of course itll cost money at an exhaust shop to do it. but as far as i see they do not make a mid pipe for AWD for some stupid reason. ok well thank you for your help and ill just have to try and get a refund then.
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