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Old 01-01-2013, 05:52 PM   #1
2fst4you
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Default Which downpipe without a CEL

Im looking at getting a downpipe but am not sure whether I want to go with a catted or catless one. I would like a cattless one for a few more ponies but want to avoid a CEL. I currently have a cobb ap and am running stage 2. Will the cobb ap allow me to hide the CEL?
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Last edited by 2fst4you; 01-01-2013 at 06:38 PM.
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Old 01-01-2013, 06:06 PM   #2
RoadKillDMD
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AP will tune out the potential CEL, even with a catless DP. You won't see any more ponies running catless on a Cobb map anyway. You'll need a pro tune to get the most out of going catless.
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Old 01-01-2013, 06:37 PM   #3
2fst4you
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Ok cool. I will probably go with a catless one then because I plan on getting it pro tuned eventually.
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Old 01-01-2013, 08:48 PM   #4
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You have an 06+ wrx. You cannot run a downpipe other than stock without a tune, due to the lean spike from the CL->OL delay.
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Old 01-01-2013, 08:54 PM   #5
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Quote:
Originally Posted by Leafy View Post
You have an 06+ wrx. You cannot run a downpipe other than stock without a tune, due to the lean spike from the CL->OL delay.
If you read his entire post he said he has an ap already
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Old 01-01-2013, 08:57 PM   #6
Leafy
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I guess I missed that. Then the next question is why are you running stage 2 without a downpipe?
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Old 01-01-2013, 09:29 PM   #7
iLOVESTi05
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I have the older Cobb catless dp but my car was protuned. Also, every WRX or STi I've ever seen with stage 2 had no CEL problem as a result of catless. If u plan on a protune, catless is the way to go
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Old 01-02-2013, 10:51 AM   #8
2fst4you
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Im not sure if I have an aftermarket dp as I bought the car this way and figured I just had a cb exhaust. I will have to check but maybe I have a Tbe. Is a dp required for a stage 2 map?
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Old 01-02-2013, 10:59 AM   #9
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Quote:
Originally Posted by 2fst4you View Post
Is a dp required for a stage 2 map?
100% yes
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Old 01-02-2013, 11:37 AM   #10
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I run the CHEAPEST catless downpipe you can buy. with intake, agency power bov and top mount intercooler on OTS Cobb stage2 map. Runs like a champ no problems in 5 months.
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Old 01-02-2013, 11:55 AM   #11
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Quote:
Originally Posted by clontz_wi64 View Post
I run the CHEAPEST catless downpipe you can buy. with intake, agency power bov and top mount intercooler on OTS Cobb stage2 map. Runs like a champ no problems in 5 months.
I had 2 problems with mine, the godspeed one. The rear o2 bung was threaded crooked and it doesn't have a bung for a wideband. I just fixed both myself and took a partial refund.
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Old 01-02-2013, 11:58 AM   #12
2fst4you
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Ok I have to already have one then. Thanks!
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Old 01-02-2013, 05:18 PM   #13
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You don't "have to" already have one. I know a company that tuned a car for "stage 2" even though it had an 18G on it. (Way over stage 2)

If you don't know what you have, find someone that can help you out. Better to be safe and not buy a duplicate part.

In the mean time, I HIGHLY suggest you goto the NEWBIES AND FAQS section, click on UNABOMBERS MANFIESTO and read it all twice.

Forgot to mention, Cobb's stage 2 tune disables any CEL related to being catless. This holds true to MOST other stage 2 tunes.

Last edited by HinshawWRX; 01-02-2013 at 05:49 PM.
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Old 01-02-2013, 11:45 PM   #14
WaitTheresMore
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take out instrument cluster>Remove CEL light bulb>Win!
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Old 01-02-2013, 11:46 PM   #15
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Quote:
Originally Posted by WaitTheresMore View Post
take out instrument cluster>Remove CEL light bulb>Win!
How do you pass plug in OBDII emissions smart ass?
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Old 01-02-2013, 11:50 PM   #16
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Quote:
Originally Posted by Leafy View Post
How do you pass plug in OBDII emissions smart ass?

OP might not live where emission testing is not required! he asked and I answered.There are plenty of threads discussing this topic. Oh yea the only downpipe I know without a CEL is the stock downpipe
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