C63 AMG (W204) 2008 - 2015
Old 06-08-2015, 03:20 PM
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DIY: carbon fiber diffuser install

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Old 03-08-2017, 08:38 AM
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2013 C350 Coupe
I know this is a major thread revival, but has anyone done a similar documentation of the newer version bumper?
Old 03-08-2017, 12:06 PM
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^^ lol i dont mind it.


Ill be ordering my rear diffuser later today from Euroteck thanks to your review.
Old 03-08-2017, 12:27 PM
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2013 C350 Coupe
See, I have a 2013 with the different rear bumper, so the diffuser attaches differently. I don't have any place to attach the factory braces to, so I'm curious what people did.
Old 03-08-2017, 01:09 PM
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Originally Posted by The Alchemist
See, I have a 2013 with the different rear bumper, so the diffuser attaches differently. I don't have any place to attach the factory braces to, so I'm curious what people did.
I took my bumper off to install my diffuser. For it to look good it took a lot of massaging. Then I put screws through tabs in rear to hold in place. For me the braces arnt really needed however I kept them installed because I think it gives it rigidity when you press on it. The part that your talking about for screws. You can either drill holes or double sided tape it to it like I did. It's solid not going anywhere.
Old 03-08-2017, 01:41 PM
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Originally Posted by AMGonFire
I took my bumper off to install my diffuser. For it to look good it took a lot of massaging. Then I put screws through tabs in rear to hold in place. For me the braces arnt really needed however I kept them installed because I think it gives it rigidity when you press on it. The part that your talking about for screws. You can either drill holes or double sided tape it to it like I did. It's solid not going anywhere.
I'd love to see where you put the screws.
Old 01-31-2018, 05:22 PM
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Anyone have an update for a facelift car CF diffuser install? Have a C63 diffuser sitting here but can't even figure out how to get the old one off
Old 02-12-2018, 01:58 PM
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Are these aftermarket CF diffusers coming with the mounting attachments to reinstall the two OE plastic brackets? I can see there are the two holes on the bottom, but is there a mounting point in the middle for the second rivet attachment? I guess I'll know tomorrow when mine arrives. I can't see how you can forego using the bracket because doesn't it throw off the alignment between the hole on the bottom of diffuser and the speed nut attachment on the body?
Old 09-09-2018, 11:17 AM
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Originally Posted by Crya
Are these aftermarket CF diffusers coming with the mounting attachments to reinstall the two OE plastic brackets? I can see there are the two holes on the bottom, but is there a mounting point in the middle for the second rivet attachment? I guess I'll know tomorrow when mine arrives. I can't see how you can forego using the bracket because doesn't it throw off the alignment between the hole on the bottom of diffuser and the speed nut attachment on the body?
which one did you get, I'm torn between RW carbon and JL Motoring.... many others don't seem to have it anymore
Old 09-09-2018, 01:02 PM
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Originally Posted by Dogtag114
which one did you get, I'm torn between RW carbon and JL Motoring.... many others don't seem to have it anymore
I did JB Speed and was happy with it. It came with the bendy tabs. I was able to get mine good enough for my preferences without pulling bumper. I did, however, go to hardware store and bought some simple nylon spacers to keep the two lower mounts taught since there's no factory bracket down there and I wanted to keep my factory piece unmolested.
Old 09-18-2018, 11:11 PM
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Originally Posted by AMGonFire
I took my bumper off to install my diffuser. For it to look good it took a lot of massaging. Then I put screws through tabs in rear to hold in place. For me the braces arnt really needed however I kept them installed because I think it gives it rigidity when you press on it. The part that your talking about for screws. You can either drill holes or double sided tape it to it like I did. It's solid not going anywhere.
Silly question... when you take off the bumper, do you install the diffuser onto the bumper then reinstall the bumper or do you have to go back and forth between the two parts to massage it in?
Old 09-19-2018, 01:39 PM
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You remove the bumper cover, swap diffusers off the car, reinstall bumper cover complete.
Old 09-23-2018, 01:04 PM
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Originally Posted by Mort
You remove the bumper cover, swap diffusers off the car, reinstall bumper cover complete.
Thanks... did mine yesterday. Still makes me nervous to be yanking plastic but it looks pretty good.

The JLMotoring diffuser has the bendy tabs. It was helpful to have my son do the bending from the back while I ensured it was lined up.

Also, for anyone doing this you need a REALLY deep socket for that recessed nut in the trunk.

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