[Whitevdub]

I just received my oem bmw performance diffuser for my 2011 e90 328i lci m-sport and i was curious if I have to cut any piece of the bumper to do the install? i keep hearing different things. i've heard that you have to cut a piece of for the pre-lci mtech but not the m-sport? is this true? if anyone has any info thatd be great

[JL-Motoring]

The e90 performance diffuser requires trimming of the plastic piece on the rear bumper

[Whitevdub]

how hard is it to cut that piece off? and if i need to put the original msport diffuser back on the car will it still fit since that piece is trimmed off?

[Whitevdub]

Bump, anyone know that??

[Whitevdub]

BUMP...any help? do i only have to cut the piece off on the left side of the bumper or the right side as well? any insight would be appreciated. I went to install it today but don't want to mess up my bumper

[Dark_Knight_335]

I don't see why you would dick around and potentially ruin your bumper to make room for something that isn't designed to fit on your car in the first place. If you insist on doing so, find someone who knows what they're doing, as it appears clear you are concerned about screwing it up doing it yourself. Why take the chance?

[Whitevdub]

Originally Posted by SDeFranco1

I don't see why you would dick around and potentially ruin your bumper to make room for something that isn't designed to fit on your car in the first place. If you insist on doing so, find someone who knows what they're doing, as it appears clear you are concerned about screwing it up doing it yourself. Why take the chance?

Well that's why i'm trying to get answers so I don't mess up the install or the bumper..i'm going to try and get someone professional to do it but I can't get a direct answer from anyone on here

[Moko]

Originally Posted by Whitevdub

Bump, anyone know that??

Here you go, hope this help

[Whitevdub]

^that helps a little bit better...but do you know if i can still put the stock m-sport diffuser back on the car if i cut that piece?

[Neutrino45]

Originally Posted by Whitevdub

^that helps a little bit better...but do you know if i can still put the stock m-sport diffuser back on the car if i cut that piece?

From what I've read, I don't believe you can.

[Whitevdub]

Originally Posted by Neutrino45

From what I've read, I don't believe you can.

where'd you read this? i pm'ed Longtran and he said I could..if anyone has experience with this can you please contribute?

[Neutrino45]

hey. if LT says it's possible then it's possible. he's the expert.

[EYE4SPEED]

1. What is the best tool to use to trim the bumper?

2. What is the part number of the DA clips and how many do you need? The OEM diffuser has plastic snaps already built into the part. The OEM Perf looks to have them as well, so where do you put the metal clips?

[EYE4SPEED]

Anyone?

[hyperguy]

Installed my OEM performance diffuser the other day.

I used a sharp steak knife tip but you could use a razor knife. It is very soft and easily scores by just running the tip. Just run it down a bunch of times and snap off pieces.

Chris

[EYE4SPEED]

How about the extra clips? Did you have to buy them or just use the built in snaps?

[hyperguy]

Tabs or snaps are built into the diffuser on top just like the original one that came on the m-sport bumper. Its the bottom screws and threads that lock it down which are already there if you have a factory bumper.

[EYE4SPEED]

So the original snaps and the screws - what about the metal clips they are talking about in the instructions a few posts up?

Can you snap a picture of yours after your install? Also, what paint option did you use - full body color or gloss/matte black? Thanks.

[Professor///M]

I hate to dig up old news, but I just did this so want to offer some advice.


1. Use the diagram in post #8, it is extremely helpful

2. In order to make the cuts, you will need the following:
a. A razor, preferably one of those expandable/collapsable ones
b. A dremel tool

3. Use the dremel to mark your initial positions. Use the dermel to cut the large thick portion displayed right under #1 in the diagram in post 8.

4. Use the razor to score the thin region from start to finish. Score the area 5-10 times.

5. At this point it should be loose enough to bend and flap backwards. Do this a few times and score it some more until you remove it.

This requires A LOT of patience because any slip with the razor or dremel and you'll ruin your bumper. I made a few small nicks, but didn't care all that much. Keep in mind the original M-Sport diffuser HIDES MORE of the bumper trim than the performance diffuser - so make sure to wash it good, and touch up any nicks you make.

Set aside a good 1.5 hours to get this done, especially if you don't lift up the car.

[FitzPower]

pic of the final result?

[dy63]

anyone help with this? will my old m sport 335d diffuser fit back on if i remove the performance diffuser in future?

[dy63]

bump