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5JABIJ8 10-18-2007 11:33 AM

M3 Diffuser on Stock bumper
Has anyone here put a M3 Diffuser on a stock rear bumper. Does it fit in directly? Any fabricatio to be done? If you have done it can you post pics as I might just change the diffuser to a M3 instead of the whole rear bumper. I want to see how it would look.


vadim321go 10-18-2007 04:07 PM

iv seen it done, apparently its really easy. just take the old black part out and put the new one in there.

5JABIJ8 10-18-2007 04:07 PM

Yeah right just that easy huh?.. cool. $60 bucks will get me M3 rear bumper!!!! yeah baby!!

thx man!

Boots R 10-18-2007 04:12 PM

lol, I also hear that it's NOT that easy. shaving and modification is needed.

5JABIJ8 10-18-2007 04:15 PM

^^Just had to brust my bubble huh!!lol jus kidding.. hopefully it won't need much modding. I'll try it out and will see what happens.

Boots R 10-18-2007 04:21 PM

lol keep us posted. It's useful info.

dbworld4k 10-18-2007 05:23 PM


Originally Posted by Boots R (Post 1067563)
lol, I also hear that it's NOT that easy. shaving and modification is needed.

You have to shave the top corners that are on the outside of the diffuser. The OEM diffuser's top corners are squared edges, whereas the non-M bumper accepts rounded edges. That's the only thing you have to change :)

carjoe 10-18-2007 10:07 PM

Pics? I know the part but I have no clue what the difference is...

Dr. Flyview 10-19-2007 11:16 AM

There are also aftermarket M-style yet not truly M that will fit the non-M bumpers plug and play. Pretty sure understeer sells them

propr'one 10-19-2007 11:20 AM

^^the one understeer/bavauto sells is scrap, a modified OEM one fits better.

euro* 10-19-2007 12:30 PM

i've noticed the aftermarket m3 diffusser for an non m3 bumper looks different, more bigger and stick's out alot. as the oem one flows better

5JABIJ8 10-19-2007 12:35 PM

Already ordered OEM M3 Diffuser should be arriving sometime in late next week. Once I get it I'll see what how to make it fit.. I will post pic's when I am done!

thumper 02-16-2008 07:00 PM

I know this is bringing up a old topic......
but any updates on how it turned out or any pictures?

zimzimmma 02-16-2008 07:26 PM

i got one, no problem.. fit fine.. looks good also.

thumper 02-16-2008 07:31 PM

^^ thanks for the reply.
Do you know the bmw part number? or does anyone else know it.
I am going to get a friend to order it for me.

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