Would I have to remove my rear bumper to install my new diffuser?

sebasupreme · 12-17-2015, 11:30 PM

Hi guys,

I recently purchased a Carbon Fiber rear diffuser and I'm looking to install it myself however, would I need to remove the rear bumper to install it?

thanks.

Fikster · 12-18-2015, 12:25 AM

no. unless it is a true "diffuser" Your valence should attach easily at the bottom of the bumper.

sebasupreme · 12-18-2015, 12:30 AM

Quote:

Originally Posted by Fikster

no. unless it is a true "diffuser" Your valence should attach easily at the bottom of the bumper.

what do you mean by "true" diffuser?

The carbon fiber diffuser I have was custom made to fit the M Tech rear bumper made by JL Motoring.

Is that considered true? Would that work?

I have the factory OEM stock fiberglass (grey looking) diffuser installed and I'm looking to remove that one.

SakhirM4 · 12-18-2015, 12:48 AM

Quote:

Originally Posted by sebasupreme

Hi guys,

I recently purchased a Carbon Fiber rear diffuser and I'm looking to install it myself however, would I need to remove the rear bumper to install it?

thanks.

You should be clear about what car and what diffuser in this forum.

Fikster · 12-18-2015, 01:04 AM

Quote:

Originally Posted by sebasupreme

what do you mean by "true" diffuser?

The carbon fiber diffuser I have was custom made to fit the M Tech rear bumper made by JL Motoring.

Is that considered true? Would that work?

I have the factory OEM stock fiberglass (grey looking) diffuser installed and I'm looking to remove that one.

Diffuser- Functional

Valance- Cosmetic... AKA "diffuser"

sebasupreme · 12-18-2015, 01:14 AM

Quote:

Originally Posted by Fikster

Diffuser- Functional

Valance- Cosmetic... AKA "diffuser"

Just a regular diffuser to replace the OEM one, the cosmetic one that you posted a pic of except that it's for a 335i coupe not an M3

sebasupreme · 12-18-2015, 01:16 AM

Quote:

Originally Posted by SakhirM4

You should be clear about what car and what diffuser in this forum.

Just a regular diffuser to replace the OEM one, dual exhaust exit, just for cosmetic purposes and it would be for a 335i coupe not an M3

Fikster · 12-18-2015, 01:17 AM

No, you should be able to reach behind bumper to release the tabs that hold the piece on. You may need to remove the plastic underbody trim held on by a few 8mm screws..

Z4M_LEV · 12-18-2015, 01:27 AM

Remove the (7) 8mm screws from the bottom of the diffuser, the top part is with tabs. Slowly pull out from one side and work your way out. Install vice versa.

sebasupreme · 12-18-2015, 01:38 AM

Quote:

Originally Posted by Fikster

No, you should be able to reach behind bumper to release the tabs that hold the piece on. You may need to remove the plastic underbody trim held on by a few 8mm screws..

Quote:

Originally Posted by Z4M_LEV

Remove the (7) 8mm screws from the bottom of the diffuser, the top part is with tabs. Slowly pull out from one side and work your way out. Install vice versa.

thanks guys for the help, tomorrow if the weather is good here in Jersey, because today was rainy, then I will install the carbon fiber rear diffuser and hopefully post pics when its done!

AK. · 12-18-2015, 10:46 PM

I had to trim it a little in order to fit the performance diffuser on my e90.

TunerStock · 12-19-2015, 09:48 PM

You don't have to remove bumper but it will make installing the diffuser a whole lot easier if you do. Rear bumper removal isn't too difficult.

12-17-2015, 11:30 PM	#1
sebasupreme Second Lieutenant 41 Rep 263 Posts Drives: 2012 N55 E92 335i M Sport 6MT Join Date: Feb 2015 Location: Essex County, New Jersey iTrader: (1)	Would I have to remove my rear bumper to install my new diffuser? Hi guys, I recently purchased a Carbon Fiber rear diffuser and I'm looking to install it myself however, would I need to remove the rear bumper to install it? thanks.
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12-18-2015, 12:25 AM	#2
Fikster Enlisted Member 5 Rep 35 Posts Drives: E39T,E36/7M,E90M Join Date: Jul 2014 Location: Dallas & Chicago iTrader: (1)	no. unless it is a true "diffuser" Your valence should attach easily at the bottom of the bumper.
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12-18-2015, 01:17 AM	#8
Fikster Enlisted Member 5 Rep 35 Posts Drives: E39T,E36/7M,E90M Join Date: Jul 2014 Location: Dallas & Chicago iTrader: (1)	No, you should be able to reach behind bumper to release the tabs that hold the piece on. You may need to remove the plastic underbody trim held on by a few 8mm screws..
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12-18-2015, 01:27 AM	#9
Z4M_LEV Banned 31 Rep 243 Posts Drives: Z4M, 750i, F30, Q50S, VW Join Date: Feb 2015 Location: Los Angeles iTrader: (0)	Remove the (7) 8mm screws from the bottom of the diffuser, the top part is with tabs. Slowly pull out from one side and work your way out. Install vice versa.
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12-18-2015, 10:46 PM	#11
AK. Lieutenant 137 Rep 589 Posts Drives: E90 M3/E92 M3 Join Date: Jan 2015 Location: California iTrader: (3) Garage List 2010 E90 335i [10.00]	I had to trim it a little in order to fit the performance diffuser on my e90.
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12-19-2015, 09:48 PM	#12
TunerStock Private First Class 41 Rep 161 Posts Drives: E92 M3 & W204 C63 Join Date: Sep 2015 Location: California iTrader: (1)	You don't have to remove bumper but it will make installing the diffuser a whole lot easier if you do. Rear bumper removal isn't too difficult.
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