E90Post
 


Extreme Powerhouse
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Cosmetic and Lighting Modifications (exterior/interior) > DIY Project - eBay Diffuser Fins Attached to M-Sport Bumper



Reply
 
Thread Tools Search this Thread
      02-12-2019, 01:18 PM   #1
dmdodd83
Registered
dmdodd83's Avatar
United_States
0
Rep
4
Posts

Drives: 2010 e90 335i
Join Date: Jan 2019
Location: SF, CA

iTrader: (0)

DIY Project - eBay Diffuser Fins Attached to M-Sport Bumper

Hey y'll, I just wanted to throw this up and out there for others thinking about doing this, to 'hand back' to the community I've been using for a few months now

I had wanted to do this for a while, as the previous owner somehow had decided to paint the diffuser insert in the M-Tech/M-Sport bumper body colored (instead of keeping it the more-aggressive stock matte black), and I thought 'why not make a little more aggressive/custom while doing the repaint'

For the $, the eBay diffuser/fins is a decent piece of kit, it isn't perfect (i.e. the spacing between the fins was off by say 1/8" to 1/4", but no one's going to notice!).
I definitely recommend buying their 'install kit' (a bunch of self-tapping screws, screw-clip sets, alcohol wipes and 3M tape) as used extra tape and self-tappers to hold to my bumper as want to makesure this doesn't get ripped-off.

It took a few hours to remove my bumper insert, clean/degrease, attach this diffuser part, then four (4) coats of Plastidip (prob the hardest part to get right in colder, wet 50F weather) to blend the bumper insert and this high-gloss black diffuser part together.
All in all, very happy, fun weekend DIY.

Parts procured:
+ One (1) "Fits 06-13 3 Series E90 E91 E92 E93 Rear Bumper Lip Diffuser 5 Fin Gloss Black" (https://www.ebay.com/itm/Fits-06-13-...k/282075402977) $30
+ One (1) "Automotive 3M Installation Hardware Front & Rear Bumper Lip / Side Skirt Install" (https://www.ebay.com/itm/For-Front-S.../282363340558?) $15
+ Two (2) Cans of Plasti-Dip Matte Black (https://www.amazon.com/Performix-112...=fsclp_pl_dp_1) $6-8ea
+ Degreaser (to prep the parts before PlastiDip'ing)
Attached Images
   
__________________
2010 e90 335i M Sport, JB4, BMS DCI, ARM 5" FMIC, ARM CP, TiaL BOV
Appreciate 0
      02-12-2019, 01:57 PM   #2
6ixSpd
Save the manuals!
6ixSpd's Avatar
Canada
3356
Rep
4,988
Posts

Drives: '12 M3 6MT, '09 328i 6MT
Join Date: Feb 2016
Location: 416

iTrader: (1)

So this is just a flap/piece that sticks on to the underside of the stock diffuser?
__________________
'12 M3 6MT Alpine White + Fox Red Extended | '09 328i 6MT Space Gray + Saddle Brown

Appreciate 0
      02-12-2019, 02:10 PM   #3
dmdodd83
Registered
dmdodd83's Avatar
United_States
0
Rep
4
Posts

Drives: 2010 e90 335i
Join Date: Jan 2019
Location: SF, CA

iTrader: (0)

Yep you got it, as shown in the eBay posting, it's a hard ABS finned part that looks like below, that you then attach direct to your OEM bumper (if non-MSport) or to the removable OEM Diffuser Insert (if you have the MSport/MTech bumper).

So in summary, if you have the MSport/MTech rear bumper and you've got the $, you can buy a $300 CF diffuser insert ... or you can DIY it like I did for a different look
If you have a non-MSport OEM bumper, this might be a decent mod still (see the pic on the eBay posting as this is a non-MSport bumper with it attached)
Attached Images
 
__________________
2010 e90 335i M Sport, JB4, BMS DCI, ARM 5" FMIC, ARM CP, TiaL BOV
Appreciate 0
      02-12-2019, 11:21 PM   #4
AWSB328iM
Lieutenant
AWSB328iM's Avatar
United_States
323
Rep
570
Posts

Drives: 2011 E92 328i M-Sport 6MT
Join Date: Nov 2016
Location: Memphis, TN

iTrader: (0)

Horrid
Appreciate 1
6ixSpd3356.00

      02-12-2019, 11:37 PM   #5
dmdodd83
Registered
dmdodd83's Avatar
United_States
0
Rep
4
Posts

Drives: 2010 e90 335i
Join Date: Jan 2019
Location: SF, CA

iTrader: (0)

Yeah, it looks chintzy when it arrives, but once it's installed correctly (including plastidipping the whole thing in) it's quite a subtle improvement, especially given it's UNDER THE CAR, so you can't really see the whole plastic part other than the fins (which is what you want anyway).
Don't worry, I'm not going to be throwing plastic caliper covers on this fine German piece of engineering: this is a diffuser insert that I was going to spraying anyway and thought I might as well try it. Plus worse-case I could buy a new aftermarket diffuser insert if I hated it.

Also thanks for your constructive feedback AWSB328iM. How's your 328i holding up... couldn't afford an N54?
__________________
2010 e90 335i M Sport, JB4, BMS DCI, ARM 5" FMIC, ARM CP, TiaL BOV
Appreciate 0
      02-13-2019, 12:01 AM   #6
6ixSpd
Save the manuals!
6ixSpd's Avatar
Canada
3356
Rep
4,988
Posts

Drives: '12 M3 6MT, '09 328i 6MT
Join Date: Feb 2016
Location: 416

iTrader: (1)

Quote:
Originally Posted by dmdodd83 View Post
How's your 328i holding up... couldn't afford an N54?
Ironic, considering you chose to do this instead of buying a proper new diffuser in the first place.
__________________
'12 M3 6MT Alpine White + Fox Red Extended | '09 328i 6MT Space Gray + Saddle Brown

Appreciate 7
      02-15-2019, 10:11 AM   #7
philgli
Lieutenant
35
Rep
444
Posts

Drives: 2011 AW E92 Msport
Join Date: May 2012
Location: Georgia

iTrader: (0)

nice work man. from almost every angle, you would only see the fins!
__________________
2011 N55 e92 Msport -Alpine White AT
MHD Stage 2, ARM 5" stepped I/C, PPK, cobb charge pipe, BMS intake, ARM I/C hose upgrade, PE mod, ST coilovers, 18x9 Apex ARC8
Currently chasing a boost leak
Appreciate 0
      02-16-2019, 01:23 PM   #8
NYBulldog
Specialist
631
Rep
1,901
Posts

Drives: Nikes
Join Date: Jun 2010
Location: NuYawk

iTrader: (14)

Idk man, why not have someone blend the plastics and paint it a uniform color?
__________________
Appreciate 0
      02-22-2019, 12:33 AM   #9
joeinsd
Captain
joeinsd's Avatar
258
Rep
857
Posts

Drives: Stock 2010 e92 335i M Sport
Join Date: Apr 2015
Location: San Diego

iTrader: (9)

Isn't this the same thing Evo owners throw on top of their cars? Smart Ebay seller marketing it as a diffuser too now.
__________________
Appreciate 0
Reply

Bookmarks

Tags
ebay diffuser fins

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -5. The time now is 03:46 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST