F8X M3/M4 M Performance Rear Diffuser DIY

Ryan@IND · 08-22-2014, 05:18 PM

The BMW Performance division continues to expand their offerings all the while keying into the desires of BMW enthusiasts around the world. The F8X M3/M4 Performance parts are a more aggressive option created by the designers at BMW ///M. The aero options from the Performance division , design by BMW ///M provide a more sporty and aggressive look all the while maintaining or accenting the factory lines. The kit includes carbon fiber front splitters, trunk spoiler, rear diffuser, and of course mirror covers. All BMW Performance carbon parts are 2x2 weave.

Please contact an IND representative with further questions.

Step 1:
The OEM diffuser is secured by 2 screws and multiple clips on the upper partition. There are two screws in the center of the diffuser that must be removed, but are not important to the factory diffuser install. Using the 8mm socket remove all 4 screws

Step 2:
With the screws removed simply pull the diffuser from the bumper. The top clips do not require much pressure so no body tools are required.

Step 3:
With the diffuser removed it is now time for install of the M Performance carbon fiber diffuser. This piece utilizes all 4 8mm screws and the existing body clips. Step 1 of the installation is to lineup the clips and carefully press into place.

Step 4:
Now that the diffuser is loosely secured by the mounting tabs simply tighten the four 8mm screws.

Enjoy!

GOLFFRR · 08-22-2014, 05:42 PM

looks super easy, even I think I could manage this one, well maybe lol

haynstyleM2 · 08-22-2014, 11:04 PM

looks awesome....i guess i know what to tell my wife what i want for christmas.....

Sir Loin · 08-22-2014, 11:18 PM

This diffuser looks so hot. I may have to swing for it... later....

Keto · 08-23-2014, 02:42 PM

I love the diffuser! Wish I liked the splitters/lip.

Vectors2final · 08-24-2014, 07:18 AM

Quote:

Originally Posted by Sir Loin

This diffuser looks so hot. I may have to swing for it... later....

Yeah, I have to do it after wheels, coils and other minor mods.

Once you figure in the diffuser and the other bits, you're in the 2k range just for some CF pieces. I'm sure some other parts will come out soon, which is probably the only benefit of being stuck in Korea right now.

Carl L · 08-29-2014, 09:45 AM

Great pics, IND. Do you have any more of the underside of the car you'd be willing to share? It's a work of art under there from what I can remember and your camera work looks to be great.

Sir Loin · 09-06-2014, 10:01 AM

A few people have said once the CF diffuser is installed, you can no longer kick under the car to open the trunk.

Does the "kick-motion-to-open trunk" comfort access still work on your car after you installed the diffuser? Thanks.

Dasm3nd · 09-07-2014, 08:41 AM

Quote:

Originally Posted by Sir Loin

A few people have said once the CF diffuser is installed, you can no longer kick under the car to open the trunk.

Does the "kick-motion-to-open trunk" comfort access still work on your car after you installed the diffuser? Thanks.

No it is not functional. Sensors are obstructed.

Ryan@IND · 09-08-2014, 01:02 PM

Quote:

Originally Posted by Sir Loin

A few people have said once the CF diffuser is installed, you can no longer kick under the car to open the trunk.

Does the "kick-motion-to-open trunk" comfort access still work on your car after you installed the diffuser? Thanks.

That is correct, the kick-motion will no longer open the trunk.

Sir Loin · 09-08-2014, 01:08 PM

Quote:

Originally Posted by Andrew@IND

That is correct, the kick-motion will no longer open the trunk.

Aw, shucks...

V3rbatim · 09-12-2015, 04:23 PM

Looks kind of nice without the diffuser. Just have to clear all the clutter under the diffuser though.

Gstone · 09-14-2015, 11:30 AM

great tool.
Do you have any step by step stuff on f82 rear spoiler install? Is this an easy DIY? Been thinking of adding one.

SD ///M4 · 04-26-2016, 05:52 PM

Quote:

Originally Posted by Ryan@IND

That is correct, the kick-motion will no longer open the trunk.

Resurrecting an old thread...

I remember a post in another thread that the kick-motion sensor can be relocated, allowing it to work with this diffuser. Has anyone done this or have a DIY or pictures showing how this is done?

bd307 · 05-03-2016, 11:44 AM

Quote:

Originally Posted by SD ///M4

Resurrecting an old thread...

I remember a post in another thread that the kick-motion sensor can be relocated, allowing it to work with this diffuser. Has anyone done this or have a DIY or pictures showing how this is done?

Also interested knowing how to relocate that sensor. Did you find out anything?

Chopstick217 · 06-19-2016, 01:32 AM

Also interested about sensor

SD ///M4 · 06-20-2016, 11:03 AM

So no one has any information on where the sensor is located and how to relocate it?

MN2///M · 06-29-2016, 03:17 PM

Quote:

Originally Posted by SD ///M4

Resurrecting an old thread...

I remember a post in another thread that the kick-motion sensor can be relocated, allowing it to work with this diffuser. Has anyone done this or have a DIY or pictures showing how this is done?

Quote:

Originally Posted by bd307

Also interested knowing how to relocate that sensor. Did you find out anything?

Quote:

Originally Posted by Chopstick217

Also interested about sensor

Here is the Thread you are looking for:
http://f80.bimmerpost.com/forums/sho....php?t=1194668

bigwilliel · 11-16-2016, 05:22 PM

thanks for the tutorial!

mdefalco25 · 03-09-2017, 05:31 PM

I can't get the bottom screw holes to line up. What am I doing wrong? Sigh.

LukeM15 · 03-10-2017, 04:44 PM

Great write up!!! I like it

SD ///M4 · 03-22-2017, 02:54 PM

Quote:

Originally Posted by RoadRunner///M

Is the fitment meant to be this bad under on the 2 centre screws?

I just went out and stuck my phone camera under the bumper and took a picture that looks pretty much like yours.

I just installed my diffuser last week and I remember that the heat shield is kind of loose fitting. After I removed the stock piece, it seemed like the heat shield ended up on the wrong side of the plastic/nylon piece, which has the mounting nut, and I had to move it so it was between the plastic piece and the tab of the diffuser.

Per the installation instructions:

Ensure that the screws (1) are screwed first through carbon rear diffuser AA and then through the heat shield into the plastic part

08-22-2014, 05:18 PM	#1
Ryan@IND 1793 Rep 7,662 Posts Drives: ACR Join Date: Mar 2008 Location: Chicago iTrader: (18)	F8X M3/M4 M Performance Rear Diffuser DIY The BMW Performance division continues to expand their offerings all the while keying into the desires of BMW enthusiasts around the world. The F8X M3/M4 Performance parts are a more aggressive option created by the designers at BMW ///M. The aero options from the Performance division , design by BMW ///M provide a more sporty and aggressive look all the while maintaining or accenting the factory lines. The kit includes carbon fiber front splitters, trunk spoiler, rear diffuser, and of course mirror covers. All BMW Performance carbon parts are 2x2 weave. Please contact an IND representative with further questions. Step 1: The OEM diffuser is secured by 2 screws and multiple clips on the upper partition. There are two screws in the center of the diffuser that must be removed, but are not important to the factory diffuser install. Using the 8mm socket remove all 4 screws Step 2: With the screws removed simply pull the diffuser from the bumper. The top clips do not require much pressure so no body tools are required. Step 3: With the diffuser removed it is now time for install of the M Performance carbon fiber diffuser. This piece utilizes all 4 8mm screws and the existing body clips. Step 1 of the installation is to lineup the clips and carefully press into place. Step 4: Now that the diffuser is loosely secured by the mounting tabs simply tighten the four 8mm screws. Enjoy! __________________ IND DISTRIBUTION \| 866-963-4520 • INSTAGRAM • FACEBOOK • FLICKR
	Appreciate 1 Foxyy266.50 Tweet Quote

08-22-2014, 05:42 PM	#2
GOLFFRR 11081 Rep 27,811 Posts Drives: GOLFFRR cart Join Date: Mar 2009 Location: we sell BMWs to "ALL" US states iTrader: (4)	looks super easy, even I think I could manage this one, well maybe lol __________________ BEFORE YOU BUY YOUR NEXT BMW, EMAIL OUR GUY KOTE FIRST! Kote M Sales:Kotem@bmwofcamarillo.com Cell:805-368-9101 vipfinance@bmwofcamarillo.com for warranties!
	Appreciate 1 m3elmo49.50 Quote

08-22-2014, 11:04 PM	#3
haynstyleM2 Major 361 Rep 1,199 Posts Drives: '24 M2 Join Date: Jul 2014 Location: Honolulu, HI iTrader: (0)	looks awesome....i guess i know what to tell my wife what i want for christmas.....
	Appreciate 0 Quote

08-22-2014, 11:18 PM	#4
Sir Loin M3AT LOVER 328 Rep 1,858 Posts Drives: Silverstone F80 M3 Join Date: Aug 2013 Location: Seattle iTrader: (0)	This diffuser looks so hot. I may have to swing for it... later.... __________________ 2015 F80 M3 \| SSII ext SO int \| M-DCT \| 19" Black Wheels
	Appreciate 1 Quote

08-23-2014, 02:42 PM	#5
Keto Lieutenant Colonel 74 Rep 1,603 Posts Drives: F80 M3 Join Date: Jul 2007 Location: WHO DAT NATION iTrader: (1) Garage List 2015 BMW M3 [10.00]	I love the diffuser! Wish I liked the splitters/lip. __________________ 2015 SO/SO MT M3 :: Exec : Lighting : Adaptive : HK : CF trim : Full leather : DAP : Black 19's : sunshade Crystalline tint 40%/70% on windshield : M performance mirrors, spoiler, splitters : Status Gruppe CF lip : RKP diffuser : Fully dechromed Bavsound Stage 1 : V1 Savvy hardwired : Self-coded
	Appreciate 0 Quote

08-29-2014, 09:45 AM	#7
Carl L Major 196 Rep 1,248 Posts Drives: '15 M3 Join Date: Aug 2012 Location: West Coast iTrader: (0)	Great pics, IND. Do you have any more of the underside of the car you'd be willing to share? It's a work of art under there from what I can remember and your camera work looks to be great.
	Appreciate 0 Quote

09-06-2014, 10:01 AM	#8
Sir Loin M3AT LOVER 328 Rep 1,858 Posts Drives: Silverstone F80 M3 Join Date: Aug 2013 Location: Seattle iTrader: (0)	A few people have said once the CF diffuser is installed, you can no longer kick under the car to open the trunk. Does the "kick-motion-to-open trunk" comfort access still work on your car after you installed the diffuser? Thanks. __________________ 2015 F80 M3 \| SSII ext SO int \| M-DCT \| 19" Black Wheels
	Appreciate 0 Quote

09-12-2015, 04:23 PM	#12
V3rbatim Captain 164 Rep 533 Posts Drives: 2016 m3 Join Date: Jun 2015 Location: NJ iTrader: (0)	Looks kind of nice without the diffuser. Just have to clear all the clutter under the diffuser though. __________________ 2016 m3 2012 yamaha r1
	Appreciate 0 Quote

09-14-2015, 11:30 AM	#13
Gstone Lieutenant 142 Rep 554 Posts Drives: '18 GT350, '15 M4 sold Join Date: Sep 2014 Location: NY Burbs iTrader: (0)	great tool. Do you have any step by step stuff on f82 rear spoiler install? Is this an easy DIY? Been thinking of adding one.
	Appreciate 0 Quote

06-19-2016, 01:32 AM	#16
Chopstick217 First Lieutenant 13 Rep 305 Posts Drives: BMW 2020 M8 F92 Donington Grey Join Date: Dec 2009 Location: Irvine, CA iTrader: (6)	Also interested about sensor __________________ 2020 Donington Grey BMW M8 Coupe Competition
	Appreciate 0 Quote

06-20-2016, 11:03 AM	#17
SD ///M4 ///Multiple 2998 Rep 4,243 Posts Drives: M4 Coupe \| M3 \| Z4M Roadster Join Date: Jan 2011 Location: San Diego, CA iTrader: (1) Garage List 2006 BMW Z4 M Roadster [8.81] 2016 BMW M4 Coupe ( ... [10.00] 2018 BMW M3 (Euro D ... [0.00] 2011 BMW 335is Coup ... [10.00]	So no one has any information on where the sensor is located and how to relocate it? __________________ The Coupe: 2016 M4 \| Sakhir Orange \| Black Full Merino Leather \| CF Trim \| M-DCT \| More \| ED 5/13/16 The Sedan: 2018 M3 \| San Marino Blue \| Black Full Merino Leather \| CF Trim \| M-DCT \| ZCP \| ED 7/18/18 The Roadster: 2006 Z4 \| Interlagos Blue \| Black Extended Nappa Leather \| Carbon Leather Trim \| Purchased 7/19/12
	Appreciate 0 Quote

11-16-2016, 05:22 PM	#19
bigwilliel New Member 2 Rep 9 Posts Drives: 2022 BMW M3 Join Date: Nov 2016 Location: Fort Lauderdale, Florida iTrader: (0)	thanks for the tutorial!
	Appreciate 0 Quote

03-09-2017, 05:31 PM	#20
mdefalco25 Captain 200 Rep 710 Posts Drives: 03 E46 M3 Join Date: Nov 2012 Location: Normal, IL iTrader: (3)	I can't get the bottom screw holes to line up. What am I doing wrong? Sigh.
	Appreciate 0 Quote

03-10-2017, 04:44 PM	#21
LukeM15 Captain 566 Rep 991 Posts Drives: M3 G80 Comp Xdrive Join Date: Nov 2016 Location: Maryland iTrader: (4)	Great write up!!! I like it
	Appreciate 0 Quote

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search