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      01-03-2012, 10:02 PM   #1
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noob q: any way to avoid getting a CEL?

So I've been doing research and been on the market for an exhaust system but have learned that any exhaust system I get, I'll also get a CEL which will result in a tune or a delete w.e. My question is, what parts (x pipe, catless, slip ons) can I install on my car to give it a great sound (idk if I can gain gains without a full system) and avoid getting a CEL??
Thanks guys!
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      01-03-2012, 10:09 PM   #2
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If you run the Innotech setup you will not get a CEL....
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      01-04-2012, 09:43 AM   #3
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what if I was to get a RPI GTM axle back exahust? Like the one on this thread, http://www.m3post.com/forums/showthread.php?t=625531
would I get a CEL?
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      01-04-2012, 10:15 AM   #4
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You can run any axleback exhaust you want, you'll never get a CEL
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      01-04-2012, 10:46 AM   #5
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You also won't get much power. The most expensive and arguably the best axle back, the titanium Akra, claims 3 rwhp. They sound nice, though. BMW just claims a "more powerful sound" for its very expensive axle back.

If you want power, consider a pulley, a filter, a midpipe and a tune. What midpipe will add power but not trigger a CEL and preserve readiness for plug in OBD2 inspection is a good question. My understanding is that you either need high flow cats (probably 300 cell) before the rear 02 or a tune with rear 02 simulation. Not many midpipes have HFC before the rear 02 (not even the Akra) and not many tuners can simulate the rear 02. M3DCTBT says he has some suggestions and I am considering them.
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      01-04-2012, 01:53 PM   #6
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i guess what i really want is the sound since gains would probably only happen if i got a full exhaust system. But something like the rpi gtm exhaust back axle would provide a huge exhaust sound improvement right?
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      01-06-2012, 01:49 PM   #7
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Quote:
Originally Posted by pbonsalb View Post
You also won't get much power. The most expensive and arguably the best axle back, the titanium Akra, claims 3 rwhp. They sound nice, though. BMW just claims a "more powerful sound" for its very expensive axle back.

If you want power, consider a pulley, a filter, a midpipe and a tune. What midpipe will add power but not trigger a CEL and preserve readiness for plug in OBD2 inspection is a good question. My understanding is that you either need high flow cats (probably 300 cell) before the rear 02 or a tune with rear 02 simulation. Not many midpipes have HFC before the rear 02 (not even the Akra) and not many tuners can simulate the rear 02. M3DCTBT says he has some suggestions and I am considering them.
It's not the catalyst cell count that triggers it, it can be done with test pipes, i've done both. It's all in the programming.
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      04-12-2012, 02:43 PM   #8
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would getting any x pipe give a cel?
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      04-12-2012, 02:46 PM   #9
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if they remove the cats yes if they have hfcs in place of the stockers no.
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      04-12-2012, 02:59 PM   #10
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getting something like this wouldnt give me a cel or the smell i hear people complaining about?
http://www.europeanautosource.com/pr...talysts-e9x-m3
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      04-12-2012, 03:46 PM   #11
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yes that retains your factory primary cats so decreases the amount of gain you would get. it also requires cutting the stock exhaust to fit behind the primary cats.
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      04-12-2012, 04:02 PM   #12
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If you're only looking for sound and not power then any axle back exhaust will work but as soon as you do a cat delete (removal of cats) then yes you will get a cel and need a tune to remove the cel.
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      04-12-2012, 04:22 PM   #13
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i ended up getting a gintani sport axle back and love it. Now im in the market for an xpipe but I want to avoid any problems with CEL's or anything else
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      04-12-2012, 04:24 PM   #14
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you got the gintani sport in the last hour? wow your fast.
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      04-12-2012, 04:35 PM   #15
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haha nah. i made this thread awhile back and just installed the exhaust 4 days ago. It got me thinking about getting an xpipe so i came here
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