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F30 / F31 / F32 / F33 / F36 (2012 - current)
The sixth generation 3 series, chassis code F30. 2013 model year 328i and 335i sedans now in production. Read the F30 frequently asked question thread for all your basic question and dive into all the details in the ultimate F30 information thread.

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  #1  
Old 01-15-2015, 05:58 PM
CAL_F30-M CAL_F30-M is offline
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M performance diffuser installed!

Finally got the diffuser installed today, took me about 20 mins total. Easy job! Love the look, now the car looks complete! But didn't figure out what to do with the rubber string come with the diffuser in 2nd pic. Anyone know what's that for? Thanks!Click image for larger version

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  #2  
Old 01-15-2015, 06:13 PM
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thaibruin thaibruin is online now
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Quote:
Originally Posted by CAL_F30-M View Post
Finally got the diffuser installed today, took me about 20 mins total. Easy job! Love the look, now the car looks complete! But didn't figure out what to do with the rubber string come with the diffuser in 2nd pic. Anyone know what's that for? Thanks!Attachment 486842Attachment 486843

Very nice! um... to pull off the diffuser when you're done with it? Like a feminine product?
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  #3  
Old 01-15-2015, 06:15 PM
CAL_F30-M CAL_F30-M is offline
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Quote:
Originally Posted by thaibruin View Post
Very nice! um... to pull off the diffuser when you're done with it? Like a feminine product?

pull off the diffuser? What you talking about? Don't get it
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  #4  
Old 01-15-2015, 06:16 PM
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thaibruin thaibruin is online now
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Originally Posted by CAL_F30-M View Post
pull off the diffuser? What you talking about? Don't get it
It was a joke. A not so good one unfortunately.
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  #5  
Old 01-15-2015, 06:17 PM
CAL_F30-M CAL_F30-M is offline
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Originally Posted by thaibruin View Post
It was a joke. A not so good one unfortunately.

Lol ok! But who knows what's that for? Must be there for a reason right? I installed with out it. But still curious.
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  #6  
Old 01-15-2015, 06:34 PM
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chiefneil chiefneil is offline
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Nice work. The m-sport should've come with the m-perf diffuser as standard from the factory, imho. It makes for a big visual improvement from the back.

Dunno what the rubber tubing is for. Probably some sort of seal.
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  #7  
Old 01-15-2015, 06:36 PM
CAL_F30-M CAL_F30-M is offline
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Originally Posted by chiefneil View Post
Nice work. The m-sport should've come with the m-perf diffuser as standard from the factory, imho. It makes for a big visual improvement from the back.



Dunno what the rubber tubing is for. Probably some sort of seal.

That's what I thought, but I didn't find any deal sort of thing when I took the original diffuser off, it's just the diffuser itself. That's why I didn't figure out what to do with that thing.
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  #8  
Old 01-15-2015, 07:27 PM
ronanz ronanz is offline
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Quote:
Originally Posted by CAL_F30-M View Post
Finally got the diffuser installed today, took me about 20 mins total. Easy job! Love the look, now the car looks complete! But didn't figure out what to do with the rubber string come with the diffuser in 2nd pic. Anyone know what's that for? Thanks!Attachment 486842Attachment 486843

It's used to mask off the "channel" around the diffuser when painting different color.

Here's mine
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Last edited by ronanz; 01-15-2015 at 09:22 PM.
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  #9  
Old 01-15-2015, 07:56 PM
CAL_F30-M CAL_F30-M is offline
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Quote:
Originally Posted by ronanz View Post
It's used to mask off the "channel" around the diffuser when painting different color.


I see!!! Thanks for the info, that means I installed it right!
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  #10  
Old 01-15-2015, 09:47 PM
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armoredsaint armoredsaint is offline
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Quote:
Originally Posted by CAL_F30-M View Post
pull off the diffuser? What you talking about? Don't get it
i think he's calling you a douche nozzle?
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  #11  
Old 01-15-2015, 11:21 PM
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JG_RSA JG_RSA is offline
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Nice

Yes, it ought to have been standard with the M-Sport package.

Here is the M Performance Aerodynamics Package Retrofit Kit (F32) install guide that came with my diffuser.
The diffuser is dealt with on pages 5 and 10. Not very insightful reading, but I upload it in case it's of any use to anyone.

I know you have the F30, but the the install procedure should be fairly similar, except for the two side grilles on the 4's diffuser and the need to black out the area on light colored cars through the right grille.
Attached Files
File Type: pdf F32 M Performance Package Retrofit.pdf (2.69 MB, 58 views)
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  #12  
Old 01-15-2015, 11:23 PM
CAL_F30-M CAL_F30-M is offline
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Quote:
Originally Posted by JG_RSA View Post
Nice



Yes, it ought to have been standard with the M-Sport package.



Here is the M Performance Aerodynamics Package Retrofit Kit (F32) install guide that came with my diffuser.

The diffuser is dealt with on pages 5 and 10. Not very insightful reading, but I upload it in case it's of any use to anyone.



I know you have the F30, but the the install procedure should be fairly similar, except for the two side grilles on the 4's diffuser and the need to black out the area on light colored cars through the right grille.

Thanks for the share!
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  #13  
Old 01-16-2015, 07:19 AM
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I'm getting my M Diffuser painted next week!!
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  #14  
Old 01-16-2015, 07:38 AM
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^
I considered it, but I actually prefer it all black on AW.
Gives a bit more contrast to the rear bumper and doesn't show dirt as easily as it would if it was partially painted white.
Just my very humble opinion.
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  #15  
Old 01-16-2015, 07:49 AM
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Originally Posted by JG_RSA View Post
^
I considered it, but I actually prefer it all black on AW.
Gives a bit more contrast to the rear bumper and doesn't show dirt as easily as it would if it was partially painted white.
Just my very humble opinion.
My black diffuser is actually white now...............covered in salt/sand from the snow covered roads. So I could leave the salt on and skip the paint job.
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  #16  
Old 01-16-2015, 08:02 AM
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Wink

Quote:
Originally Posted by KAP8 View Post
My black diffuser is actually white now...............covered in salt/sand from the snow covered roads. So I could leave the salt on and skip the paint job.
Yeah, I don't have that problem where I keep the F33...
We had a terrible winter last year. Temperature went down all the way to 12 degrees Celsius during one week. I actually had to use the air scarf when I dropped the top.

Last edited by JG_RSA; 01-19-2015 at 08:08 AM.
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  #17  
Old 01-16-2015, 08:05 AM
Dippydo Dippydo is offline
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Quote:
Originally Posted by chiefneil View Post
Nice work. The m-sport should've come with the m-perf diffuser as standard from the factory, imho. It makes for a big visual improvement from the back.

Dunno what the rubber tubing is for. Probably some sort of seal.

There's a lot of extra parts the M sport should have came with...LOL...
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  #18  
Old 01-16-2015, 08:06 AM
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Originally Posted by JG_RSA View Post
We had a terrible winter last year. Temperature went down all the way to 12 degrees Celsius during one week. I actually had to use the air scarf when I dropped the top.
All the way down to 12C?

It was -2C here this morning, and that's WARM considering last week was around -14C average.....
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Old 01-16-2015, 08:25 AM
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Last edited by JG_RSA; 01-16-2015 at 08:56 AM. Reason: Off topic and overshared
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  #20  
Old 01-16-2015, 06:58 PM
fisal.salim.75 fisal.salim.75 is offline
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Thanks


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  #21  
Old 01-16-2015, 07:10 PM
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Your diffuser looks great OP. I'd like to get one too for my 335 but don't think its worth the $600 at the stealership. Anybody knows where to get a better deal on one of these?
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  #22  
Old 01-16-2015, 08:04 PM
CAL_F30-M CAL_F30-M is offline
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Originally Posted by xsiv View Post
Your diffuser looks great OP. I'd like to get one too for my 335 but don't think its worth the $600 at the stealership. Anybody knows where to get a better deal on one of these?

https://www.getbmwparts.com/partloca...10&startrow=26

Try this site man, same price as what I paid for.
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  #23  
Old 01-16-2015, 08:22 PM
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Originally Posted by CAL_F30-M View Post
https://www.getbmwparts.com/partloca...10&startrow=26

Try this site man, same price as what I paid for.
Awesome thanks!
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  #24  
Old 01-16-2015, 08:44 PM
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Looks like price inflation, mine was $380 back in the spring.



Left it satin black.
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  #25  
Old 01-16-2015, 09:39 PM
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Originally Posted by bear-avhistory View Post
Looks like price inflation, mine was $380 back in the spring.



Left it satin black.
Nice pic! It looks good unpainted. Was it $380 from the same vendor? Or did you purchase somewhere else?
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