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Facelift C300 CF Rear Diffuser

Old 06-19-2016, 09:01 PM
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2014 C300 Sport
Facelift C300 CF Rear Diffuser

I have been searching and I cannot find an answer. I have a CF rear diffuser coming in a few days. Via the awesome DIY made by user DOCKT, I have the general gist of the installation. What I read elsewhere was that the facelift 12-14's DO NOT have the Torx 20 screws on the far left and right and actually have rivets.

How did you facelift guys do this? Did you remove the entire rear bumper to drill out those rivets? Is there a way to do it without removing the bumper?
Old 06-20-2016, 01:37 AM
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I pretty much just broke mine off because i got fustrated lol it's not really a big deal, you can still put it back on if you want.

Originally Posted by 97 GSX 97
I have been searching and I cannot find an answer. I have a CF rear diffuser coming in a few days. Via the awesome DIY made by user DOCKT, I have the general gist of the installation. What I read elsewhere was that the facelift 12-14's DO NOT have the Torx 20 screws on the far left and right and actually have rivets.

How did you facelift guys do this? Did you remove the entire rear bumper to drill out those rivets? Is there a way to do it without removing the bumper?
Old 06-20-2016, 10:18 PM
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no need to remove the bumper. remove the tips and drill it out, and get some small bolts and washers and install them, instead of getting new rivets.

I can say thats the easy part of the install.

my tip would be install the brackets on the car first then go clip the diffuser in from the middle and work your way to each side. than put all the finish bolts on the diffuser brackets and the rivet spot.

should take 10-15 minutes, took me about an hour the first time doing it alone till i said F this its about a million times easier with another person.
Old 06-21-2016, 12:38 AM
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Originally Posted by MB Marko
no need to remove the bumper. remove the tips and drill it out, and get some small bolts and washers and install them, instead of getting new rivets.

I can say thats the easy part of the install.

my tip would be install the brackets on the car first then go clip the diffuser in from the middle and work your way to each side. than put all the finish bolts on the diffuser brackets and the rivet spot.

should take 10-15 minutes, took me about an hour the first time doing it alone till i said F this its about a million times easier with another person.
Alright thanks!
Old 06-21-2016, 11:27 AM
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Just a heads up to facelift owners:

I bought my CF diffuser from ebay member "promotor2014". The product did have to come from Taiwan, but it made it here to Pennsylvania in 4 days (very impressive). The fitment seemed to be "on" more then what some people mentioned as "a fight to get it on both sides". I was extremely happy to see that this diffuser accepted the OEM C300 diffuser brackets.

No need to buy the C63 brackets.

Now to start my worry was having to take the exhaust off to get the rivet on the left and right side off. What I did was remove the 2 lower torx screws, and also the 2 10mm that hold the mounting brackets behind the diffuser. That gave me some flexibility and movement. Now I never planned on installing the stock diffuser again so rather then remove everything I used a fresh razor blade and trimmed just under the rivet. The diffuser came out no problem. Then I had flexibility in the bumper to slightly bend it and drill out the rivet.

Total time: 35 minutes start to finish

PICS:







Old 06-21-2016, 12:17 PM
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lookin good! what tips did you end up going with?
Old 06-21-2016, 01:26 PM
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Originally Posted by MB Marko
lookin good! what tips did you end up going with?
The quad E63 square AMG tips. Hopefully going to get them welded on friday if possible.
Old 06-21-2016, 02:12 PM
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sweet, I'm telling you get the x-pipe! you will love it, i thought i would hate it... i was wrong. ahaha
Old 06-21-2016, 02:27 PM
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Originally Posted by MB Marko
sweet, I'm telling you get the x-pipe! you will love it, i thought i would hate it... i was wrong. ahaha
I already have the Magnaflow 2.25" X-Pipe waiting to go on with the AMG tips!

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