afe midpipe questions

wallacelau · 10-11-2018, 05:14 PM

Hi, I have an e92 328i with the n51 engine and is looking into an afe midpipe to pair up with my pe. My question is that would installing an afe midpipe triggers a CEL? and since I am in California, would I still be able to pass the smog check with the afe midpipe?
I did some research and found that some says the midpipe is longer so the exhaust sticks out a little bit but some says the afe midpipe has the exact same lenght. Can anyone confirm that you dont need to shorten any pipe to fit it with the pe?
Thanks in advance

S65Hunter · 10-11-2018, 07:58 PM

Nope no CEL will be triggered since theres no 02 sensors from the mid pipes back.

mike@x-ph.com · 10-12-2018, 02:02 PM

Quote:

Originally Posted by AlpineE93

Nope no CEL will be triggered since theres no 02 sensors from the mid pipes back.

+1

Phyrexia · 10-12-2018, 05:31 PM

California emissions testing varies by county. If you have a visual, you will fail. If you have a sniffer test, you may fail. If you just have an OBDII test, you will pass.

It may be worth mentioning that the fines for being caught in California with modified emissions equipment are very, very steep. Proceed with caution.

Quote:

Originally Posted by wallacelau

Hi, I have an e92 328i with the n51 engine and is looking into an afe midpipe to pair up with my pe. My question is that would installing an afe midpipe triggers a CEL? and since I am in California, would I still be able to pass the smog check with the afe midpipe?
I did some research and found that some says the midpipe is longer so the exhaust sticks out a little bit but some says the afe midpipe has the exact same lenght. Can anyone confirm that you dont need to shorten any pipe to fit it with the pe?
Thanks in advance

Phyrexia · 10-12-2018, 05:32 PM

And since your stock exhaust had to be cut to use the PE, it's hard to tell if any midpipe will just clamp right into place. My hunch is that the midpipes are usually built longer than necessary so that you can trim them to length.

wallacelau · 10-12-2018, 06:54 PM

oh dang, maybe I should just leave it alone then

10-11-2018, 05:14 PM	#1
wallacelau Second Lieutenant 18 Rep 216 Posts Drives: e92 328i Join Date: Sep 2015 Location: CA iTrader: (0)	afe midpipe questions Hi, I have an e92 328i with the n51 engine and is looking into an afe midpipe to pair up with my pe. My question is that would installing an afe midpipe triggers a CEL? and since I am in California, would I still be able to pass the smog check with the afe midpipe? I did some research and found that some says the midpipe is longer so the exhaust sticks out a little bit but some says the afe midpipe has the exact same lenght. Can anyone confirm that you dont need to shorten any pipe to fit it with the pe? Thanks in advance
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10-11-2018, 07:58 PM	#2
S65Hunter Major 1188 Rep 1,455 Posts Drives: 2009 E92 M3 Join Date: May 2018 Location: Dallas TX iTrader: (0) Garage List [0.00]	Nope no CEL will be triggered since theres no 02 sensors from the mid pipes back.
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10-12-2018, 05:32 PM	#5
Phyrexia Resident Pedant 503 Rep 792 Posts Drives: '15 335i 8AT Join Date: Nov 2017 Location: Limbo iTrader: (1)	And since your stock exhaust had to be cut to use the PE, it's hard to tell if any midpipe will just clamp right into place. My hunch is that the midpipes are usually built longer than necessary so that you can trim them to length.
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10-12-2018, 06:54 PM	#6
wallacelau Second Lieutenant 18 Rep 216 Posts Drives: e92 328i Join Date: Sep 2015 Location: CA iTrader: (0)	oh dang, maybe I should just leave it alone then
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