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Metal Core high flow cats now only $75 on ebay....

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Old 02-07-2010, 12:55 AM
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Depending on if your car us US spec or Euro spec it makes a difference whether you have 1 or 2 sets of cats. The W209 CLK500 & CLk550 US Spec do have primaries & secondaries, if you are over seas then you will only have one set of cats. Hope that helps.

Thericker - glad to help out

Last edited by AMS Performance; 02-07-2010 at 01:02 AM.
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Old 02-07-2010, 01:13 AM
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Originally Posted by AMS Performance
Depending on if your car us US spec or Euro spec it makes a difference whether you have 1 or 2 sets of cats. The W209 CLK500 & CLk550 US Spec do have primaries & secondaries, if you are over seas then you will only have one set of cats. Hope that helps.

Thericker - glad to help out

I deleted the two things i circled(in red)....except on my 07 CLK550 there was ONE of the first bubble things not 2, and my exhaust stop told me they were just reasonaters.

The resonatoer i circled in purple, is that the primary or secondary? that's the only one i see and it looks to be on my headers.
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Old 09-06-2010, 01:36 AM
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Are these high flow cats drop in or do they need drilling for the 02sensor?
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Old 09-11-2010, 01:21 PM
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Originally Posted by MarcusF
Speaking from experience - as long as the substrate holds up, you'll pass with aftermarket cats. My name-brand-supplier's cats were dead in two years, but YMMV. The tough part will be finding someone in SoCal to install cats that don't have a CARB sticker.


Per the California Air Resources Board website the following cats are legal for OBDII Mercedes Benz’
  • Car Sound (Magnaflow) 46000 series cats for 1996-2000
  • AirTek (CATCO) 410000 series cats for 1995-2002 (can't find them in the CATCO catalog)
  • Miller Catalyzer Corp 12000/11000 series cats for 1995-2004
  • Valina (CarTex) 12500 series cats for 1996-2000.
None of those have a metal substrate. Other than that, you’ll need a *friendly* SoCal muffler shop. Anyone want to start a private PM chain? Don't post it in the open or the *friendly* shop will probably get closed. Another option – Vegas. Perhaps an MBWorld poster from Vegas can make a shop recommendation for those willing to drive out on Friday night, get the cats installed Saturday morning, and then wrap up the weekend at the tables.
Very helpful post, Marcus! Great insights for those of us in Calif. I like the Vegas idea. I used to do those trips once a month in college, these days it's more like once a year, lol.
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Old 05-02-2011, 12:34 PM
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Andy,

I just did a true dual on my CLK550 and find a bit too loud. I origionally took out the 2 bubble resonators and the secondary cat. Will i lose a lot of power going from no secondary cats to this? I'm only doing it becuase i find that my car is a bit too loud and has too much drone.
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Old 05-02-2011, 04:31 PM
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I used these 300 cell cats w/custom downpipes from my Turbos, relocated O2 sensors & bungs NO check Engine lights & recently passed stringent CA SMOG w/NO tricks on crapy 91 octane. They're surprisingly afforable & durable been on nearly (2) years now...
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Old 05-08-2011, 02:40 AM
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'05 C200K SS, '05 Kleemann CLK500K, '08 Hummer H3 & '92 Z34 5sp (track car in Canada)
Originally Posted by Thericker
I used these 300 cell cats w/custom downpipes from my Turbos, relocated O2 sensors & bungs NO check Engine lights & recently passed stringent CA SMOG w/NO tricks on crapy 91 octane. They're surprisingly afforable & durable been on nearly (2) years now...
Do you just have the 300 cells in place or do you also have secondaries?
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Old 05-24-2011, 07:32 PM
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hey AMS, im probably gonna get rid of my secondary cats, but will these fit as replacements for the primaries? i have an 03 clk 55
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Old 05-24-2011, 07:33 PM
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hahaha just realized the first post was in 09 hahah
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Old 05-25-2011, 01:54 PM
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Originally Posted by Kevwood
Do you just have the 300 cells in place or do you also have secondaries?
SL600/65 come w/huge primaries that once opened/removed = 2 cats in ea cage so YES just running the single 300 cell cats (1) ea side that's it NO mufflers just 3" straight pipe on out!
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Old 05-25-2011, 04:20 PM
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2003 CLK 55 AMG
Originally Posted by Thericker
SL600/65 come w/huge primaries that once opened/removed = 2 cats in ea cage so YES just running the single 300 cell cats (1) ea side that's it NO mufflers just 3" straight pipe on out!
DAMN that **** must roar like a beast.. got any vids of it? also.. did you lose a lot of low end power with that setup?
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Old 06-26-2011, 07:38 AM
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The links to eBay have expired...can anyone help me find these? There are so many universal options and most don't tell you the cell psi...

Ordering some headers, so I need to get these too!
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Old 06-26-2011, 01:51 PM
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http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
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Old 06-26-2011, 01:57 PM
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W208 CLK55 AMG, F30 335i M-Sport
would anyone mind posting an ebay link to 300 cell w208 clk55 amg cats?
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Old 06-26-2011, 08:54 PM
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Thanks elijah!!!

Just ordered the cats, now ordering the headers...CAN'T WAIT TO INSTALL
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Old 06-27-2011, 04:17 AM
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Originally Posted by quick123
Thanks elijah!!!

Just ordered the cats, now ordering the headers...CAN'T WAIT TO INSTALL
No problem. Which headers are you considering?
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Old 06-27-2011, 07:17 AM
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Originally Posted by elijah

Is two of those enough for replacing all 4 stock on clk 55 w209?

thanks
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Old 06-27-2011, 08:26 AM
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Originally Posted by elijah
No problem. Which headers are you considering?
Ordered the AMS headers...can't wait to hear the difference in sound...

Once I get everything installed, I will take some pics and some sound clips for everyone...
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Old 06-27-2011, 10:51 AM
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Originally Posted by mjaa
Is two of those enough for replacing all 4 stock on clk 55 w209?

thanks
Two is all you need.
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Old 06-27-2011, 11:47 AM
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Originally Posted by elijah
Two is all you need.
Thanks!


Btw, someone told me to do X pipe, what you guys think of that?

Headers, downpipe, x pipe, cats. ?
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Old 06-27-2011, 12:48 PM
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Originally Posted by mjaa
Thanks!


Btw, someone told me to do X pipe, what you guys think of that?

Headers, downpipe, x pipe, cats. ?
There are several ways to go about it and it's true most of us on the forum went with the X-pipe.

My setup: Stock headers --> X Pipe --> Straight Pipes --> Borla Muffler --> 300 cell cats to the exhaust tips and it's loud.
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