Latest Upgrade - OEM Carbon Diffuser (with added pictures)

A truly terrible looking device.

There is a certain art to sweeping lines and aerodynamics, that is neither.
 
Have to agree looks as if trying too hard all a bit of a mess far too many badges...But one mans meat is another mans.......
 
There is no easy way to modify the rear bumper on the Z4M to accomodate a the CF diffuser due to the very different lower edge profile treatment, where the Z4m incorporates a mesh vent. Underneath you also start to encounter problems as the CF diffuser fits to the lower of the battery box which is in a different place on the Z4M. The Z4M also incorporates an integral diffuser between the rear axle and the grill mesh that would feed the air up inside the new diffuser.

Of course the minor issue of the quad exhaust has to be ovecome

EDIT - We've done the spoiler debate a couple of times before and the general feeling is most people who post responses roll on the floor laughing at lip spoilers, but a few do like them. Each to their own of course, but imho they do nothing at all for the lines and indeed damage the aerodynamic effectiveness of the rear.
 
that Hamann thing looks totally naff. The rear of the z4 doesnt need a spoiler, just a diffuser and then your done....!

Breaker, that diffuser looks really good....!
 
That looks good. Need more pictures though.

Would look good on mine :D
 
I was not that serious about the rear spoiler. :) It is very hard to find a spoiler that makes the Z4 even better.

I think I'm not going to do more on the bodywork.
 
ksher said:
I was not that serious about the rear spoiler. :) It is very hard to find a spoiler that makes the Z4 even better.

I think I'm not going to do more on the bodywork.

exactly, you dont need to, it doesnt need it. Do you have any more pictures of that cool looking rear diffuser ?
 
looks brilliant 8)
Need a shot of the whole thing from the rear aspect to see properly. Its the contrast with the light body colour that i think i like.
 
without doubt the best spoiler ever ever ever is sadly only avaiable for the coupe, you could even use it to moore a boat up to :rofl:

:sick:
bmw-z4-acs-2007-21.jpg


yes that is just stuck to the rear screen, but just think of all that downforce :P
 
rob davey said:
without doubt the best spoiler ever ever ever is sadly only avaiable for the coupe, you could even use it to moore a boat up to :rofl:

:sick:
bmw-z4-acs-2007-21.jpg


yes that is just stuck to the rear screen, but just think of all that downforce :P

I prefer this rear spoiler and diffuser if I have a Z4 Coupe. :D

15064274.jpg
 
the thing I don't like with those carbon diffusers is the way it makes the exhausts look wonky, I've seen a few fitted and they all look the same.
 
Very hard to photograph eh ksher..

I really struggled to get enough light under the highly reflective diffuser to show it off. I think it looks way better in the flesh than in quick photos.
 
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