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Discussion Starter #1
Been reading a few days now about the delete but I don't know whether I should just delete resonator or also delete the 2nd cats while I'm or the shops under there. Is there benefits of taking off cats? I want a deeper sound and a lot of people on forums say it's a good route other then spending $800 for a system.
 

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Premium Member 2005 SLK55 AMG
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Although we have different cars, I'll answer from my point of view, for my car...

I considered the same decision for quite a while before I had the work done on my exhaust. Another local member had the resonator delete on his SLK 55, replaced by an x-pipe, and still had the secondary cats in place. He very kindly took me for a ride in his car, and it definitely sounded better than standard... but, in the end, I decided to have the secondary cats deleted from mine too... and I'm delighted with the results (links in my sig)! >:D

I've no idea what the difference would be for your car/engine though, so perhaps some others with more specific experience might also comment here too...
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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having an r170, my exhaust is fully custom, from the header back. I had my cat replaced with a high-flow cat to keep it emissions legal, but other than that, it's just straight through, no muffler, or anything. it's 2" aluminum piping with a set of C63 tips custom welded on. I have a Manzo stainless steel header, designed for the c230, wrapped and welded on to the rest of the exhaust. the car is quite loud, especially with cold starts. i"ll see if i can post a couple of videos so you can get an idea of it.

https://youtu.be/Hz3vJ4UtsOs
https://youtu.be/H1l_v92IF-Q


 

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Discussion Starter #5
Remember in Floriduh, even though we have not had emission testing in over 30 years, it is still illegal to remove the (any) cats :D
Having said that, I am missing my primary cat but I also have the ecu tune. (see my thread here if you haven't

http://www.slkworld.com/slk-r171-general-discussion/174881-my-baby-had-operation-kleemann-ecu-tune-headers-downpipes-vids.html
How different does it sound from just a res delete to res and 2nd cat delete. Id rather have it 1 and done instead of driving back to the exhaust shop, cut the cats, and not like it and have to put it back on lol
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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it is always easier to delete than replace.
I would remove only 1 thing at a time to see what the sound result is
 
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