darwin329

Anyone here deleted secondary CAT without any issues like engine lights on? any difference with sound? am currently using stock performance exhaust.

skim7x

... how do you have 557 posts and not know the answer to your questions.

https://mbworld.org/forums/c63-c63s-...f-exhaust.html

Yes, many have deleted secondary CAT without issues.
Sensors are located before secondary CAT.
25% more sound. "Should have come like this from factory"

darwin329

yeah 500 plus post originally came from regular w205 c400. thanks for the reply thou.

KJ

I just read the whole thread, I'm totally going to do it!!!

Wexlax732

Sound increases significantly upon wide open throttle. Oops and burbles are more pronounced when upshiftong and downshifting. Take it somewhere reputable and expect to pay anywhere between $180-$300

Alex98

Spot on

darwin329

Thank you!!

Wexlax732

Sure man. I get it... Sometimes using the search function doesn’t make you feel like your exact question was answered. Been there plenty of times. My two cents is that it’s a worthwhile mod to bide your time til you say F it and get downpipes like I am. If you want, check out my Instagram or YouTube channel for sound checks. @wexlax732

darwin329

cool. I will follow you. Btw, secondary cat delete wont have issues with smog test

Sanch

Have a look at a few of my videos.


This ones secondary cat delete only




This ones secondary cat delete with software update (multiple pops now)



Best thing I did, it sound great... even better when driving under load!

darwin329

dAaamnnn!! I love the sound!!!🚀 ThAnks for sharing Sanch!! Btw, do you like your Porterfield? Its less dust ha😉

Sanch

Oh they are great, the fronts seem to have next to no break dust at all after 2 weeks. Rears are about 50% less then OEM. Best thing... so much easier to clean too.

Ryane8182

j2dna

I have the same issue in Dallas...

KJ

I had one shop tell me that, but they were inexperienced with the W205 C63S. They looked at the shop manual and thought they had to drop the transmission to do it (which is not true at all).

I ended up getting it done at Eurocharged in Toronto.

South Florida has so many great shops, for sure you should be able to find someone to do it. All they need is a welding torch and a mirror. Hopefully someone here can help recommend a place!

Alex98

Gexhaust has done a few cars including mine, not 10/10 work but gets the job done and held the welds. They have 2 locations, one in ft lauderdale area and one in miami

Ryane8182

If you don't mind, what did they charge you and how long did it take?

The Corndog

G'day all, I have a 2017 C63S coupe and I'm based in Australia. I recently undertook the secondary cat delete which made a positive difference in noise (louder) however it has introduced another issue which is a noticable rattle from 2500-3000 in second and third going up through the gears, and 3000-2500 in second and third coming back down.

Given the amount of complaints at the below thread, I am very surprised I didn't read about this potential issue in any of the comments above?

https://mbworld.org/forums/c63-c63s-...s-coupe-3.html

Just a warning for those of you wanting to do the secondary cat delete.

untamedd

the rattle is due a faulty H pipe valve. nothing to do with the sec cat delete

The Corndog

Yes but it was either not faulty or not noticeable before the cat delete and immediately noticeable afterwards. For people wanting to make the decision for the cat delete, they should be informed before doing it.

Encore818

My rattle actually became less noticeable after my cat delete.

allgoldmac

Got mine done today. Only took around 1 hour and cost $150. Car sounds great now.

W205-S

Awesome! Who did the work? Performance Muffler? Think I saw you the other day on Hayden...I was in my DD.

We need to meet up after this stupid Pandemic...are you a member of AZ AMG on Facebook???

allgoldmac

Yep performance muffler!
What you driving for your DD?
Would be cool to hear the difference between our cars. I'll join the group right now.

W205-S

Yes should get together and check out the sound difference.

Well it is not really my DD as I drive my AMG when ever I can but my Chevy Trax is mainly for driving to work, when there is bad weather or if I need to haul stuff.