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      05-26-2020, 11:49 AM   #1
sandrik93
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230i M perf diffuser installation Exhaust issue

Hi,
I installed the M performance diffuser on my 230i (using installation manual and instructions from fellow forum members)..
As expected, the exhaust pipes look "tucked in" too much under the diffuser as it pokes out more than the standard one. I got the exhaust finisher adapter (extender), per manual, part # 18302287043 and based on my measurements, it fits the exhaust pipe, however stock tips are too wide and don't fit to adapters. I assume this was designed so you also buy M perf tips, which I would like to avoid - I don't mind stock tips. I ordered the M240i adapters with the hope that the tips will fit, but not sure if the adapters will fit my exhaust pipe.
Any thoughts on how I should figure all this out?
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      08-11-2020, 01:18 PM   #2
Winemaker2
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Quote:
Originally Posted by sandrik93 View Post
Hi,
I installed the M performance diffuser on my 230i (using installation manual and instructions from fellow forum members)..
As expected, the exhaust pipes look "tucked in" too much under the diffuser as it pokes out more than the standard one. I got the exhaust finisher adapter (extender), per manual, part # 18302287043 and based on my measurements, it fits the exhaust pipe, however stock tips are too wide and don't fit to adapters. I assume this was designed so you also buy M perf tips, which I would like to avoid - I don't mind stock tips. I ordered the M240i adapters with the hope that the tips will fit, but not sure if the adapters will fit my exhaust pipe.
Any thoughts on how I should figure all this out?
Do they make a left-side only dual tip diffuser? Want to upgrade but I have the Dinan free flow exhaust, left side exhaust outlet.
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      08-15-2020, 06:50 PM   #3
Sisyrx
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2017 BMW 230i  [0.00]
Quote:
Originally Posted by Winemaker2 View Post
Quote:
Originally Posted by sandrik93 View Post
Hi,
I installed the M performance diffuser on my 230i (using installation manual and instructions from fellow forum members)..
As expected, the exhaust pipes look "tucked in" too much under the diffuser as it pokes out more than the standard one. I got the exhaust finisher adapter (extender), per manual, part # 18302287043 and based on my measurements, it fits the exhaust pipe, however stock tips are too wide and don't fit to adapters. I assume this was designed so you also buy M perf tips, which I would like to avoid - I don't mind stock tips. I ordered the M240i adapters with the hope that the tips will fit, but not sure if the adapters will fit my exhaust pipe.
Any thoughts on how I should figure all this out?
Do they make a left-side only dual tip diffuser? Want to upgrade but I have the Dinan free flow exhaust, left side exhaust outlet.
Yes they do, but it's hard to find them. My old notes show it as part #51192343354.
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      08-15-2020, 07:45 PM   #4
John in VA
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Quote:
Originally Posted by Sisyrx View Post
Yes they do, but it's hard to find them. My old notes show it as part #51192343354.
Googling that part # shows them selling for $370 from getbmwparts.com, but photo shows single L&R pipe exits.
https://www.getbmwparts.com/oem-part...0i-51192343354

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      08-15-2020, 07:52 PM   #5
Sisyrx
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Quote:
Originally Posted by John in VA View Post
Quote:
Originally Posted by Sisyrx View Post
Yes they do, but it's hard to find them. My old notes show it as part #51192343354.
Googling that part # shows them selling for $370 from getbmwparts.com, but photo shows single L&R pipe exits.
https://www.getbmwparts.com/oem-part...0i-51192343354

[IMG]https://s3.amazonaws.com/rparts-site...846c827670.png[/IMG]
I had the same problem when googling images a year or so ago. There are two distinct part umbers but I have never seen the correct image on a vendor's site.

Here's a link to an older classified that shows the diffuser. I got the model number from the seller while I was deciding on which style to go with.


Selling 228/230 M Performance Diffuser in Toronto https://www.2addicts.com/forums/show....php?t=1585046
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      08-17-2020, 10:19 AM   #6
sandrik93
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Quote:
Originally Posted by Winemaker2 View Post
Do they make a left-side only dual tip diffuser? Want to upgrade but I have the Dinan free flow exhaust, left side exhaust outlet.
They do. The part number mentioned above is correct.
What it looks like with M perf exhaust tips:
And yes, I know the car is dirty. I washed it yesterday
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      08-17-2020, 01:50 PM   #7
Winemaker2
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It's been a bit confusing comparing the referenced part no. to the pictures. Thank you for showing an installed mp diffuser. Looks great. I have the anodized Dinan exhaust which should work nicely. How was fitment, any issues? And if you don't mind, where did you purchase it from.
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      08-18-2020, 09:28 AM   #8
sandrik93
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Quote:
Originally Posted by Winemaker2 View Post
It's been a bit confusing comparing the referenced part no. to the pictures. Thank you for showing an installed mp diffuser. Looks great. I have the anodized Dinan exhaust which should work nicely. How was fitment, any issues? And if you don't mind, where did you purchase it from.
No fitment issues. Installed myself without lifting the car. There's a nice thread here that explains the installation (M240i diffuser and this one are installed the exact same way). https://www.2addicts.com/forums/show....php?t=1264471
I got it from a fellow forum member who did not need it.
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      09-07-2020, 07:05 PM   #9
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Quote:
Originally Posted by sandrik93 View Post
They do. The part number mentioned above is correct.
What it looks like with M perf exhaust tips:
And yes, I know the car is dirty. I washed it yesterday
What is the part number for the m performance exhaust for the 230i?
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      09-08-2020, 09:28 AM   #10
sandrik93
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Quote:
Originally Posted by Rollo` View Post
What is the part number for the m performance exhaust for the 230i?
BMW does not make M Perf exhaust for 230i. I only have the exhaust tips.
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