C218 CLS63, 2011 - 2019

CF rear diffuser.

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Old 02-26-2021 | 02:14 PM
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Originally Posted by _KO_
The Renntech looking ones are too sweet. Totally change ur car. I love mine


Does look sweet huh? I just took mine off as well as the front lip; both from Renntech and I'm actually liking the look after almost 10 years of those parts on!
Old 02-26-2021 | 03:11 PM
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Originally Posted by hyperion667
Does look sweet huh? I just took mine off as well as the front lip; both from Renntech and I'm actually liking the look after almost 10 years of those parts on!
Ur crazy man! I feel like it’s so much meaner from the back after putting the diffuser on. I just want that euro rear light in the diffuser. That thing is the final touch
Old 02-26-2021 | 03:16 PM
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Originally Posted by _KO_
Ur crazy man! I feel like it’s so much meaner from the back after putting the diffuser on. I just want that euro rear light in the diffuser. That thing is the final touch
It is certainly meaner, mine was cracked and looked like shiot, also why I removed the front splitter....no longer was it balanced looking......now I have the CF mirror shells that look out of place to me too.
Old 02-27-2021 | 09:29 AM
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Originally Posted by hyperion667
Does look sweet huh? I just took mine off as well as the front lip; both from Renntech and I'm actually liking the look after almost 10 years of those parts on!
Just noticing that you have new signature Hey, how much lower does RT front lip look? I really like the style but have a concern for its clearance. The 3-piece was a snap on with screws and tape, right?
Old 02-27-2021 | 12:14 PM
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Originally Posted by dustinN
Just noticing that you have new signature Hey, how much lower does RT front lip look? I really like the style but have a concern for its clearance. The 3-piece was a snap on with screws and tape, right?
It doesn't make it that low, but I did scrape the bottom a few times, just seems inevitable with a front lip. It wasn't actually cracked, just had some chipping and fading, but I did buy it almost 10 years ago! I think it could still look good maybe, it's not as in bad shape as the rear diff was.....might be salvagable for someone that knows how to refurbish CF It really only looked crappy on the right side.
I AM liking the stock look though, I can actually see the exhaust tips again LOL! They are dirty AF though And yes: screws and taped on.....I have holes now that it's removed
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Old 04-08-2021 | 01:12 PM
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How much did you pay to get the RT diffuser installed? I got 2 quotes $100 from a body shop doing lots of MB, BMW, Porsche and another quote for $400 at a custom shop doing lots a high end car as well. The $300 difference confuses me
Old 04-08-2021 | 01:31 PM
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Originally Posted by dustinN
How much did you pay to get the RT diffuser installed? I got 2 quotes $100 from a body shop doing lots of MB, BMW, Porsche and another quote for $400 at a custom shop doing lots a high end car as well. The $300 difference confuses me
Don't pay to have it installed. It literally goes on in minutes with a drill and screwdriver. You need one drill bit for 4 pilot holes and then put in four 1/2" screws. Entire process is less than 10 minutes with the most basic of hand tools. You could even do it without the drill with self tapping screws.
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Old 04-08-2021 | 01:43 PM
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Originally Posted by 12CLS63
Don't pay to have it installed. It literally goes on in minutes with a drill and screwdriver. You need one drill bit for 4 pilot holes and then put in four 1/2" screws. Entire process is less than 10 minutes with the most basic of hand tools. You could even do it without the drill with self tapping screws.
Wow, is that easy? Vendor advised to remove the bumper for proper fitment. I don't even know how to remove the OEM diffuser. I'm thinking I will try it myself first, if I screw it up, I can bring it to the shop. You sound so easy but the shop quoted 2 to 3 hours labor.
Old 04-08-2021 | 01:58 PM
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Originally Posted by 12CLS63
Don't pay to have it installed. It literally goes on in minutes with a drill and screwdriver. You need one drill bit for 4 pilot holes and then put in four 1/2" screws. Entire process is less than 10 minutes with the most basic of hand tools. You could even do it without the drill with self tapping screws.
Maybe it's because your diffuser has been installed on your car for a long time, its shape has already bent to fit the bumper's curve. The new diffuser won't fit that perfectly, especially the after market one; just like the issue you had with your AF-1. I wish/hope it's easy as you said but I doubt about it. Thank you man.
Old 04-08-2021 | 02:28 PM
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Originally Posted by dustinN
Maybe it's because your diffuser has been installed on your car for a long time, its shape has already bent to fit the bumper's curve. The new diffuser won't fit that perfectly, especially the after market one; just like the issue you had with your AF-1. I wish/hope it's easy as you said but I doubt about it. Thank you man.
Don't take your bumper off. You want the diffuser to be shaped to it, not the other way around. Force the diffuser to the bumper shape and then secure it. If you go the other way you risk tearing out your new diffuser mounting points when you put the bumper back on and have to get those mounting points lined up to the car. The af-1 I put on was just poor quality. With the two pieces side by side you can see the differences in the fit and finish of the mounting points. I've done aftermarket body parts on a lot of different cars for years and the construction of the mounting points will always tell you the quality of the rest of part. The pleasantly surprising part about the af1 was that it had an excellent surface finish. Now that I've gotten it to the shape I want I'm super pleased with it. The Rt style one is a better made piece that had that shape already and could be easily put on and taken off. The af1 will hopefully never need to come off.
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Old 04-08-2021 | 03:10 PM
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Originally Posted by 12CLS63
Don't take your bumper off. You want the diffuser to be shaped to it, not the other way around. Force the diffuser to the bumper shape and then secure it. If you go the other way you risk tearing out your new diffuser mounting points when you put the bumper back on and have to get those mounting points lined up to the car. The af-1 I put on was just poor quality. With the two pieces side by side you can see the differences in the fit and finish of the mounting points. I've done aftermarket body parts on a lot of different cars for years and the construction of the mounting points will always tell you the quality of the rest of part. The pleasantly surprising part about the af1 was that it had an excellent surface finish. Now that I've gotten it to the shape I want I'm super pleased with it. The Rt style one is a better made piece that had that shape already and could be easily put on and taken off. The af1 will hopefully never need to come off.
Thank you for the important tips. You have years of experience installing body parts on cars that's why it's so easy for you. I have never done this before so I don't even know where to start. I guess I need to google on how to remove the OEM diffuser first. Thanks again.
Old 04-08-2021 | 03:57 PM
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Originally Posted by 12CLS63
Don't take your bumper off. You want the diffuser to be shaped to it, not the other way around. Force the diffuser to the bumper shape and then secure it. If you go the other way you risk tearing out your new diffuser mounting points when you put the bumper back on and have to get those mounting points lined up to the car. The af-1 I put on was just poor quality. With the two pieces side by side you can see the differences in the fit and finish of the mounting points. I've done aftermarket body parts on a lot of different cars for years and the construction of the mounting points will always tell you the quality of the rest of part. The pleasantly surprising part about the af1 was that it had an excellent surface finish. Now that I've gotten it to the shape I want I'm super pleased with it. The Rt style one is a better made piece that had that shape already and could be easily put on and taken off. The af1 will hopefully never need to come off.
Old 04-08-2021 | 05:21 PM
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Originally Posted by dustinN
Thank you for the important tips. You have years of experience installing body parts on cars that's why it's so easy for you. I have never done this before so I don't even know where to start. I guess I need to google on how to remove the OEM diffuser first. Thanks again.
That's why I'm pushing you to do it. I hate that shops rip people off for easy jobs and this is one of the easiest. It's a great one to learn on. If you can change your light bulbs you can do this. Just got to get out there and do it!
Old 04-15-2021 | 04:18 PM
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Finally ...


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Old 04-15-2021 | 04:42 PM
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Looks awesome Dustin, I admit I miss mine......just doesn't look as tough without it! Enjoy! Park it in reverse when you're home so you can admire it
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Old 04-15-2021 | 04:48 PM
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Thank you man. To me, it looks much better now. I really enjoy it.
Old 04-15-2021 | 05:33 PM
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Looks great! of course, I'm partial to the color.

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Old 04-15-2021 | 05:45 PM
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Hey 12CLS63, did you extend your AMG tips? I can't see mine now but the tips are still showing on yours.
Old 04-15-2021 | 06:31 PM
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Originally Posted by 12CLS63
Looks great! of course, I'm partial to the color.
Front lip looks killer. Sorry if I missed your post but what kind is it? How was installation? I'm looking for a new front lip too
Old 04-22-2021 | 05:01 PM
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Replaced the straight pipes with a longer set, I am now able to see the AMG tips again. Resonator delete should be done after the CF diffuser installed, that way you won't pay twice like I did :-) Oh well, I am happy with the look now, that's all mater to me.


Old 04-22-2021 | 06:27 PM
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Oh yeah, that's what they look like
Old 04-22-2021 | 07:59 PM
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Originally Posted by dustinN
Hey 12CLS63, did you extend your AMG tips? I can't see mine now but the tips are still showing on yours.
I did not extend the tips on mine, but I'm running the AF1 diffuser now. They were tucked in a little with the RT style before.

AF1 front lip also.
Old 04-22-2021 | 08:43 PM
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I almost got the AF-1 rear diffuser. I am curious as how it looks. Can you post an up close picture? Thanks.
Old 04-22-2021 | 08:53 PM
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Originally Posted by dustinN
I almost got the AF-1 rear diffuser. I am curious as how it looks. Can you post an up close picture? Thanks.
Sure. What exactly are you wanting to see on it?
Old 04-22-2021 | 09:05 PM
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Here are a couple I have sitting around right now in






case they cover what you want to see.
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