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      12-12-2020, 01:07 PM   #1
RollTideBimmer
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CF rear diffuser (over/under) exhaust

So I'm looking at CF rear diffusers. I'm seeing 2 different styles. One in which the diffuser goes over the exhaust and the other in which it goes under. What's everyone's experience with either and why did you choose one or the other? I also have thought about getting the one that goes over, but purchase the additional pieces that connect under the exhaust that way I can get essentially both looks in one.
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      12-12-2020, 07:23 PM   #2
RollTideBimmer
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LOL I guess that I should have mentioned that this is for a 2015 650i Gran Coupe. I don't now how I forgot that.
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      12-13-2020, 02:52 PM   #3
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Many of the CF rear diffusers that "go over" the exhaust have fitment issues and will need to be installed by a body shop. I recommend buying the factory M6 lowe bumper cover then a CF diffuser to "go under" the exhaust. Something like this...

Name:  rw-carbon-fiber-bmw-f06-m6-gran-coupe-dtm-rear-diffuser(1).jpg
Views: 4105
Size:  89.6 KB
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      12-29-2020, 09:52 PM   #4
RollTideBimmer
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happen to have a link for the lower bumper cover?

Quote:
Originally Posted by doggboy View Post
Many of the CF rear diffusers that "go over" the exhaust have fitment issues and will need to be installed by a body shop. I recommend buying the factory M6 lowe bumper cover then a CF diffuser to "go under" the exhaust. Something like this...

Attachment 2482213
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      12-30-2020, 04:41 PM   #5
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https://parts.bmwofsouthatlanta.com/...QtNGwtdjgtZ2Fz


If you search that part number you can find it cheaper, but any BMW dealer should be able to orded it for you.
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      12-30-2020, 06:59 PM   #6
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Quote:
Originally Posted by doggboy View Post
https://parts.bmwofsouthatlanta.com/...QtNGwtdjgtZ2Fz


If you search that part number you can find it cheaper, but any BMW dealer should be able to orded it for you.
true ..also if ure bmw dealer has it but more expensive..ask them to price match. That's what i did
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      03-12-2021, 08:29 AM   #7
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Quote:
Originally Posted by doggboy View Post
https://parts.bmwofsouthatlanta.com/...QtNGwtdjgtZ2Fz


If you search that part number you can find it cheaper, but any BMW dealer should be able to orded it for you.

I have a 2014 650 convertible M-Sport

Will this part for the M6 fit a M sport rear bumper ?
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      03-12-2021, 06:03 PM   #8
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Quote:
Originally Posted by Feelin Nauti View Post
I have a 2014 650 convertible M-Sport

Will this part for the M6 fit a M sport rear bumper ?
Yep, the M6 and the 650i msport have the same rear bumpers.
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      03-14-2021, 03:23 PM   #9
Feelin Nauti
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Quote:
Originally Posted by doggboy View Post
Many of the CF rear diffusers that "go over" the exhaust have fitment issues and will need to be installed by a body shop. I recommend buying the factory M6 lowe bumper cover then a CF diffuser to "go under" the exhaust. Something like this...

Attachment 2482213
Where did you get the CF rear lower section and how was the fitment?
Also where did you get the trunk spoiler. Any pics of the trunk spoiler from the front and side view.
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      03-17-2021, 12:09 PM   #10
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Quote:
Originally Posted by Feelin Nauti View Post
Where did you get the CF rear lower section and how was the fitment?
Also where did you get the trunk spoiler. Any pics of the trunk spoiler from the front and side view.
Sorry, that is not my car. That is a stock photo from RW carbon.
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      03-18-2021, 02:02 PM   #11
J_ONeill
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That particular spoiler was a DTM style, same as the rear diffuser. I havent seen it on their site in a while but the GTX style spoiler looks very close to it.

Is RW Carbon a rep here? Maybe they can confirm
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      01-02-2023, 03:14 PM   #12
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Does the rear lower m6 valance need to be painted?
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      01-02-2023, 04:10 PM   #13
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Quote:
Originally Posted by doggboy View Post
https://parts.bmwofsouthatlanta.com/...QtNGwtdjgtZ2Fz


If you search that part number you can find it cheaper, but any BMW dealer should be able to orded it for you.
Is that the only part that needs to be changed? I saw someone else say there's some lip that needs to be changed out as well? I think it's part number 51128050516?
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