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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning MPE with and without diffuser

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      12-01-2014, 02:51 AM   #1
AbuQutaita
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MPE with and without diffuser

I was checking the parts catalog, and I noticed that there are two options for the MPE (source): one for use with the diffuser and one without. They have different part numbers, and different prices. The one with the diffuser is $1,100, and without the diffuser its $1,233.03 (source). But in the diagram they're identical.

What's the actual difference between these two options?
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      12-01-2014, 03:49 AM   #2
AnooooOH
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When you want to use the exhaust with the m performance diffuser, you need a much longer version.

If you get the option with diffuser und use the stock diffuser, the tips will stick out way too much.
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      12-02-2014, 12:30 AM   #3
AbuQutaita
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Hmm, interesting. Are there any pics of the systems that show the difference in length?
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      12-02-2014, 06:48 AM   #4
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before:



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      12-02-2014, 01:23 PM   #5
AbuQutaita
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Great, thanks for the pics!
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      02-27-2017, 02:29 AM   #6
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if I'm putting the m performance exhaust on my non m sport 13 328i sedan i get it w/o diffuser?
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      02-27-2017, 02:49 AM   #7
dukeapenguin
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I forget the parts number but there is a extend tips set for aftermarket MP diffuser user.

Ask your dealer parts department
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      02-27-2017, 12:55 PM   #8
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Quote:
Originally Posted by AbuQutaita View Post
Great, thanks for the pics!
Keep in mind those aren't the OEM M-Performance tips. Those are aftermarket pieces. The OEM M-Performance tips won't stick out quite as far as depicted plus the M-Performance tips are not slash cut. I have the "long" M-Performance muffler on my M235 without the diffuser. It looks fine, but with the diffuser would look better.
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      03-06-2017, 11:57 AM   #9
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The difference is 1" , if you have the exhaust for the stock diffuser you can just slide the tips back 5/8" and it will fit the M diffuser just fine.
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