Fitting the OEM Carbon rear diffuser ('07 coupe)

Breaker said:
This pic posted on another thread annoyed me because it was fitted out of centre! (if you can't see it then you shouldn't fit one yourself! :P ).
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Correct, looked at that pic many times and never noticed that before :oops:

cj10jeeper said:
...the £550 region.
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Ouch, not something that I would pay that much for (if I had a Z4 that is!) and wouldn't feel too confident about fitting it myself.
 
cj10jeeper said:
Wondermike - The instructions specify 2 hours labour, so count on around £240 assuming no remidial paintwork and add that to the approx £300 for the diffuser and you're in the £550 region.

To me though as much of the satisfaction comes from doing the job myself and personalising the car. I'm sure Breaker feels the same.
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I agree. It's also that adrenalin rush when you take that first cut to your pride and joy and the elation when it all goes right!! :P
 
Hope you're not referring to mine being off centre Breaker? I'm aware the front lip is temporarily tagged to the bottom of the rejigged battery box that's not true until the floor panel is welded in.
 
cj10jeeper said:
Hope you're not referring to mine being off centre Breaker? I'm aware the front lip is temporarily tagged to the bottom of the rejigged battery box that's not true until the floor panel is welded in.
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No, your's looks fine to me, it's the pic you posted of the grey Z4. I've included the pic in the post now. :wink:
 
Nice! I was afraid it was going to look a little odd with only the left side pipes, but it looks great. Definitely on my to-do list. :thumbsup:
 
Breaker said:
cj10jeeper said:
Hope you're not referring to mine being off centre Breaker? I'm aware the front lip is temporarily tagged to the bottom of the rejigged battery box that's not true until the floor panel is welded in.
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No, your's looks fine to me, it's the pic you posted of the grey Z4. I've included the pic in the post now. :wink:
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Ha Ha - glad about that. The one pictured does look odd not I see it again. Could just be the angle of the photograph though
 
Thanks. The exhaust trims are the standard ones. :)

One thing I am going to keep an eye on is heat build up from the exhaust tips on the carbon. It gets a little warm after a good trip down a motorway. I guess it's no different to stock, but I may stick a piece of heat resistant tape to the underside of the exhaust cut out. It won't be seen from the rear.
 
Breaker said:
One thing I am going to keep an eye on is heat build up from the exhaust tips on the carbon. It gets a little warm after a good trip down a motorway. I guess it's no different to stock, but I may stick a piece of heat resistant tape to the underside of the exhaust cut out. It won't be seen from the rear.
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As part of my project I had to cut a lot off the diffuser and wondered if it would respond to heat to bend or roll edges. Heat gun on full for 5 minutes made no impact at all until eventually it started to smoulder. It took tremendous heat Vs what could get to it from the tip of an exhaust, so I'd not be too worried.
 
Thanks for that. :thumbsup:
I'll just keep an eye on it.

I guess they do use carbon fibre as muffler material on motorbikes thinking about it! :)
 
By the way, I'm now thinking of taking the Z4 badge off the rear as I think it will look better without it now! :wink:

What do you think?

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I have never liked the Z badge. I did not have it on my previous Z either and you don't get it with the M.
 
Thinking of de-///M'ing mine, as all my M5s have had non-M badging but I think giving it a 432i badge would look daft, so it's likely to be a simple removal of all 3 M badges instead.
 
Breaker said:
Thanks, and 1 week on it hasn't fallen off yet either!! :P

Still think it looks well 8)
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After seeing the carbon diffuser on Brawn GP's F1 car and its performance, I am very interested in getting one for my Z4. Does the rear carbon diffuser increase the downforce and improve stability at speed on your coupe?
 
ksher said:
Breaker said:
Thanks, and 1 week on it hasn't fallen off yet either!! :P

Still think it looks well 8)
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After seeing the carbon diffuser on Brawn GP's F1 car and its performance, I am very interested in getting one for my Z4. Does the rear carbon diffuser increase the downforce and improve stability at speed on your coupe?
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Not really noticed any improvement. I guess only a track day comparison would give a true reading though.

It doesn't matter really if it works or not because it looks so much cooler than stock! It really does make a difference to the back of the car. Photos don't do it justice! 8)

I'm thinking of adding the little carbon boot spoiler now also! :wink:
 
Love the look Breaker. I didn't realise they were so well priced (well it is compared to the AC Schnitzer Carbon Diffuser I was considering before!). Having seen this, I'm a little more interested now.. :P

Caddyshk said:
Aftermarket versions are available for M's if anyone is interested.
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Do you have a link?
 
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