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Secondary Cat Resonator and Backbox delete on CLK500

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Old 12-07-2013, 09:38 AM
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CLK 500
Secondary Cat Resonator and Backbox delete on CLK500

Hey guys!


After experiencing potential cat failure (unstable idle, and foul smell after strong acceleration) on clk500 wanted to get rid off the cats. But hey always wanted to have a quad system in place, so thought why not cut the cats and the rest and replace it with straight pipe system high flow resonator and quad tail pipes. So, went to the garage this afternoon and handed in my beauty to a hippy looking exhaust guy

Will update soon with sound video and my opinion on sound and power gain!

So far this is the progress guys

Secondary Cat Resonator and Backbox delete on CLK500-image-2172015721.jpg
Attached Thumbnails Secondary Cat Resonator and Backbox delete on CLK500-image-1196986703.jpg  
Old 12-07-2013, 09:48 AM
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2008 clk550 - Navigator - Frontier
I think you're about to "crank up some volume".
Old 12-07-2013, 09:55 AM
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Originally Posted by Fatz
I think you're about to "crank up some volume".
Fatz i really hope so
Old 12-07-2013, 11:09 AM
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Almost done, just final adjustments, video coming shortley

Secondary Cat Resonator and Backbox delete on CLK500-image-4082037595.jpg
Attached Thumbnails Secondary Cat Resonator and Backbox delete on CLK500-image-3427482507.jpg  
Old 01-19-2014, 11:02 PM
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None for now
Hey did you get the black series sway bar or did you just angle the pipe for the right side away from the sway bar?
Old 01-20-2014, 12:55 AM
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Where did you get the tips?
Old 01-20-2014, 10:54 AM
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2008 clk550 - Navigator - Frontier
Originally Posted by kb24forlife24
Hey did you get the black series sway bar or did you just angle the pipe for the right side away from the sway bar?
From the pic it seems that the right side is about 1" lower than the left with 2 45 degree bends to avoid the lower section of the sway bar. Looks very clean. If the shop used has the capability, a mandrel, more smooth, bend could be used.

Looks like plenty of room along the tire well to. That gap along the spare well is 4"+ inches.

I may have that section around the sway bar reworked on mine next summer to resemble this.
Old 01-20-2014, 01:08 PM
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Post the video! I'm excited to hear how it sounds... Man I want to do this
Old 01-23-2014, 12:45 PM
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Originally Posted by kb24forlife24
Hey did you get the black series sway bar or did you just angle the pipe for the right side away from the sway bar?
Hey mate, the guy at the workshop worked around it, the clearance is great so was no need to change the sway bar, its neatly done and didnt cost an arm and a leg. Still cant get enough of driving it, its a total transformation. Really happy with it!
How did you get yours done?
Old 01-23-2014, 12:46 PM
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Originally Posted by jkiddd33
Where did you get the tips?
Tips were from the same garage guy, its a similar looking to amg tips but these are not angled like amg but the pair only costed me $70
Old 01-23-2014, 12:50 PM
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Originally Posted by Fatz

From the pic it seems that the right side is about 1" lower than the left with 2 45 degree bends to avoid the lower section of the sway bar. Looks very clean. If the shop used has the capability, a mandrel, more smooth, bend could be used.

Looks like plenty of room along the tire well to. That gap along the spare well is 4"+ inches.

I may have that section around the sway bar reworked on mine next summer to resemble this.
Cheers mate! Summed it up nicely!
Old 01-23-2014, 12:52 PM
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Originally Posted by villeds
Post the video! I'm excited to hear how it sounds... Man I want to do this
My iphone sound is not recording for some reason, hence have not yet uploaded a video, will try tonight using gf ipad
Old 01-23-2014, 02:29 PM
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Originally Posted by villeds
Post the video! I'm excited to hear how it sounds... Man I want to do this
Here's a short video of the sound, the car does need a "little" wash

Old 01-23-2014, 02:52 PM
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sound from the inside!
first half of the video is with windows up. this is more of aggressive driving above 4000 rpm. so a little loud inside. road was extremely slippery so shifting like a fool
Old 01-27-2014, 08:33 PM
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very nicely done mate! looks really clean. I see that you didnt put a J-Pipe on it, it there any drone at the moment? cheers!
Old 01-27-2014, 11:25 PM
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Originally Posted by beejaypunsalan
very nicely done mate! looks really clean. I see that you didnt put a J-Pipe on it, it there any drone at the moment? cheers!
I believe you can hear the drone at 30-38 seconds on a decel and at 45seconds on accel. I would guess these are at about 1900 and 2500 rpm. Maybe gbert can correct or affirm my guess.
Old 01-27-2014, 11:26 PM
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Very nice...
Old 01-28-2014, 06:19 PM
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I'll be joining the quad crew soon. The last part came in.. AMG tips.

Secondary Cat Resonator and Backbox delete on CLK500-forumrunner_20140128_181905.png

Still debating on the deleting the 2nd cat or replacing with vibrant resenator
Old 01-31-2014, 06:22 PM
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Originally Posted by beejaypunsalan
very nicely done mate! looks really clean. I see that you didnt put a J-Pipe on it, it there any drone at the moment? cheers!
Hey beejaypunsalan! Yep Fatz you are correct! there is a drone at around 2000rpm, but it isn't loud enough to bother me or the passengers. Cruising on the highway at 60mph the noise level is fine, I do a lot of long distance runs on the motorway, 5-6 hours each way and don't have headache from the sound. CLK has good quality sound insulation, so unless you drive with windows down, the drone wouldn't really bother you.
Old 01-31-2014, 06:33 PM
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Originally Posted by omega48er
I'll be joining the quad crew soon. The last part came in.. AMG tips.

Attachment 277519

Still debating on the deleting the 2nd cat or replacing with vibrant resenator
Hey congrats on your purchase mate! looks like a very nice and neat kit! How much did the tips set you back?? With the cat's, it depends what you want from the car, they do restrict the flow and eat away a fair amount of horses, so getting rid of them will definitely ease the flow and crank up some volume, but having a vibrant resonator in place might give you a deeper gurgling sound. Suppose just have to experiment a little with it and see what you like. Upload some photos/video once you do it, would be nice to see the setup and itching to hear what it would sound like. Good luck mate!
Old 01-31-2014, 06:34 PM
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Originally Posted by Fatz
Very nice...
Fatz! Cheers mate!!
Old 01-31-2014, 06:49 PM
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Originally Posted by gbert2288-clk
Hey beejaypunsalan! Yep Fatz you are correct! there is a drone at around 2000rpm, but it isn't loud enough to bother me or the passengers. Cruising on the highway at 60mph the noise level is fine, I do a lot of long distance runs on the motorway, 5-6 hours each way and don't have headache from the sound. CLK has good quality sound insulation, so unless you drive with windows down, the drone wouldn't really bother you.
good to know, coz im planning on doing the same on my E. took the secondary cat out already now im thinking of deleting the muffler as well.
Old 01-31-2014, 06:54 PM
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Originally Posted by beejaypunsalan
good to know, coz im planning on doing the same on my E. took the secondary cat out already now im thinking of deleting the muffler as well.
Did you notice any improvements after the delete? You planning to keep stock resonator or change that too?
Old 01-31-2014, 07:17 PM
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Originally Posted by gbert2288-clk
Did you notice any improvements after the delete? You planning to keep stock resonator or change that too?
a lil bit, I only have a V6 on my E so I think its more psychological for me than anything else.

you mean the rear box? im planning on deleting that altogether. there's a another guy from the 211 forum who's done it. my only dilemma is that I dont have cut out rear bumper so im still on the fence.
Old 01-31-2014, 08:07 PM
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Originally Posted by gbert2288-clk
Hey beejaypunsalan! Yep Fatz you are correct! there is a drone at around 2000rpm, but it isn't loud enough to bother me or the passengers. Cruising on the highway at 60mph the noise level is fine, I do a lot of long distance runs on the motorway, 5-6 hours each way and don't have headache from the sound. CLK has good quality sound insulation, so unless you drive with windows down, the drone wouldn't really bother you.
I am actually only bothered by the drone when the windows are up. I didn't pay much attention to it until the weather got cold (seldom use the A/C). I've been working on a solution for several months and it looks promising. Will post some videos in about a month.

You're sounding good. There's nothing like the feeling I get in mine when the rpm climbs above 1600 and moves steadily (and within the limits of the law) toward redline....... Dang!


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