BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      03-07-2013, 11:37 AM   #1
i128
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Exhaust Diameter 128i

Anyone know the OEM exhaust piping diameter?

someone told me it was 2.25, is this accurate?

Thanks,
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      03-07-2013, 01:47 PM   #2
youngdoc1
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http://www.1addicts.com/forums/showthread.php?t=722393

^^They discuss stock vs. upgraded exhaust diameters in this thread.
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      03-07-2013, 02:54 PM   #3
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Quote:
Originally Posted by youngdoc1 View Post
http://www.1addicts.com/forums/showthread.php?t=722393

^^They discuss stock vs. upgraded exhaust diameters in this thread.
Thanks, but they only seem to speak of the 135i and the 130.

surely I know that the 135i has a larger pipe...

is the 130's exhaust diameter identical to the 128i's ?
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      03-07-2013, 04:32 PM   #4
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Hopefully

someone will chime in here. My 128 is buried in garage underneath car cover for a few more weeks.
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      03-07-2013, 06:49 PM   #5
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2008 BMW 128i  [0.00]
Look up Super Sprint exhaust on their website for 125i, they have measurements for the twin pipes & the single rear pipe.

I posted them in the No Love thread or the No regrets thread.
I think it was 50 mm and 70mm
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      03-07-2013, 07:10 PM   #6
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I have a 130i, and the rear portion is for sure 2.5in. I think that is one of the differences with the 125/128i. Looks like the 130i shares exhaust dimensions with the 135i.
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      03-07-2013, 08:01 PM   #7
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it's definitely a small diameter piping 2.25 sounds very close to what i remember what the exhaust guys were telling me when they were ordering piping for my car. If I have time i'll left and measure and let u know.
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      03-08-2013, 10:21 AM   #8
i128
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Thanks for looking into it guys...

reason i'm asking is because im working on a retrofit, but need a temporary solution.

hence need to know the exact diameter before ordering parts.
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