[Ph0zenstone]

Figure i get more responses here...does anyone have a pic of the underside of their mtech diffuser? Mine doesn't have any mounting points other than the two end points and i noticed a couple members on the board have the same issue in their pictures. There are holes in the mid section of the diffuser but no where to mount it to. Does anyone have pics of where theres are mounted? here are some pics of what i mean...

[hipnotic]

how does it sound?

[chrisE92]

For a stock 328i, there is another plastic panel that connects the diffuser to the bottom of the storage tray. I wouldn't recommend putting that plastic panel back on after you do exhaust work like that because the pipe would probably melt the plastic. I don't have any pictures because I threw mine away after getting my quad exhaust installed.

[JunkStory]

the 335i has a totally different under body than the 328i, which doesn't have the proper mounting points for a 335i diffuser.

335i

[Ph0zenstone]

Does anyone with the conversion have a solution to mounting the diffuser securely? Im just worried it'd rip off when it starts snowing and I'm plowing thru a foot of snow in my Xi.

[Space Gunmetal E92]

I fabricated mine out of an aluminum sheet and just wrapped it in CF vinyl

sorry should have cleaned it before taking pictures, will retake in daylight.

[BLKND335]

I have done a lot of work on my rear diffuser. I got the M-sport package so with that there is a plastic bar that connects the middle hole to the top of the bumper and the one on the right side connects to a bar. You could go on http://www.realoem.com and look up a car with M-sport and order the plastic bar which I'm sure you can make work on your set-up. What I did on mine was switched out the diffuser for the 335is one which has the fins. Then I cut out a kinda triangle shaped piece of aluminum and connected it to the bottom of the trunk cargo bottom and then to the holes on the bottom of the diffuser, similar to the set-up above. A 335i as you know has a lot more room underneath especially when u get an aftermarket exhaust so if you tried that it would be a little different but should be easy since you have so much more cargo bottom. It essentially does not allow air to get trapped in the diffuser and helps prevent lift. I will look for my pics and post them. Hope that helps! (The pics will make it a lot more clear)