2ND CATS DELETE + X PIPE
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Newbie
Joined: Nov 2016
Posts: 14
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2014 c300
2ND CATS DELETE + X PIPE
Im getting my 2.25" magnaflow x pipe installed tomorrow and i was wondering if i wanted my car to be louder after that should i be doing a 2nd cats delete. How much would the 2nd cats delete cost and is it worth it. Would i be getting any error messages if i ran the x pipe as well as 2nd cats delete?
Super Member
Joined: Oct 2014
Posts: 701
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From: Ontario, Canada
2009 C63 AMG, 2010 C250 4Matic Sport
Do this. Remove the large resonator (where the x-pipe is in the picture) and leave the secondary cats/resonators alone. Makes it louder, sounds good, no highway drone
Member
Joined: Aug 2015
Posts: 126
Likes: 7
From: Boston MA
C320 sport 2003, c300 4matic sport 2013, 2018 GLE63 AMG
My story, went to the shop, installed my own xpipe 100$, drove one day, i barely heard any difference with xpipe, came back to the shop second day and deleted second cats 100$.. if you do everything at once it should be maximum 150$. Less then 30 min job. No errors. Sounds much more better then just an xpipe. Cold starts will be loud for like first 10 seconds then it calms down. No drone also.
Last edited by arkim989; Jul 13, 2017 at 02:58 AM.
Senior Member
Joined: May 2016
Posts: 379
Likes: 43
From: ALLENTOWN PA
2017 AMG GT, 2015 ML350, 2013 C300
My story, went to the shop, installed my own xpipe 100$, drove one day, i barely heard any difference with xpipe, came back to the shop second day and deleted second cats 100$.. if you do everything at once it should be maximum 150$. Less then 30 min job. No errors. Sounds much more better then just an xpipe. Cold starts will be loud for like first 10 seconds then it calms down. No drone also.
Should've done it this way.
Xpipe alone hardly did anything.
Junior Member
Joined: Sep 2016
Posts: 57
Likes: 2
From: Boston, MA
C300 4-Matic Sport
Isn't deleted the 2ndary cats completely illegal for passing emissions? I passed with the muffler delete from a sketchy shop that admitted it wasn't legal but "liked the sound" :p
MBWorld Fanatic!
Joined: Apr 2016
Posts: 4,762
Likes: 566
From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
you really cant get a direct answer on this because apparently...
EVERY W204 Sounds different. Even if you have same car. Marko's for example, was just X-pipe, just like Funk's, and they both made a big difference.
Others, not so much. Could be US/CA market? OBVIOUSLY engine size will matter but that is a given.
No matter what, it seems that no one can expect the exact same result with 2 comparable w204's.
EVERY W204 Sounds different. Even if you have same car. Marko's for example, was just X-pipe, just like Funk's, and they both made a big difference.
Others, not so much. Could be US/CA market? OBVIOUSLY engine size will matter but that is a given.
No matter what, it seems that no one can expect the exact same result with 2 comparable w204's.
Super Member
Joined: Sep 2015
Posts: 848
Likes: 87
From: Milwaukee, WI USA
2012 C300 4Matic
The "secondary cats" are just resonators. They are not catalytic converters and do not affect emissions. Now, if you had to pass some kind of state safety inspection and they saw/heard there were no mufflers, that would be a different story.
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Junior Member
Joined: Sep 2016
Posts: 57
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From: Boston, MA
C300 4-Matic Sport
IF they saw? LMAO they check everything here in MA, I don't know where your from but if they don't actually thorough check your car top to bottom before issuing you a new sticker, then you sir are very lucky. Depending on where I go to get my inspection, some places would have failed me for my muffler delete.
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Member
Joined: Aug 2015
Posts: 126
Likes: 7
From: Boston MA
C320 sport 2003, c300 4matic sport 2013, 2018 GLE63 AMG
IF they saw? LMAO they check everything here in MA, I don't know where your from but if they don't actually thorough check your car top to bottom before issuing you a new sticker, then you sir are very lucky. Depending on where I go to get my inspection, some places would have failed me for my muffler delete.
Super Member
Joined: Sep 2015
Posts: 848
Likes: 87
From: Milwaukee, WI USA
2012 C300 4Matic
IF they saw? LMAO they check everything here in MA, I don't know where your from but if they don't actually thorough check your car top to bottom before issuing you a new sticker, then you sir are very lucky. Depending on where I go to get my inspection, some places would have failed me for my muffler delete.
Super Member
Joined: Jun 2016
Posts: 562
Likes: 75
Mercedes w204 4matic sport
IF they saw? LMAO they check everything here in MA, I don't know where your from but if they don't actually thorough check your car top to bottom before issuing you a new sticker, then you sir are very lucky. Depending on where I go to get my inspection, some places would have failed me for my muffler delete.
Senior Member
Joined: Apr 2014
Posts: 321
Likes: 34
From: Massachusetts
2010 C350 Sport
I had just an x-pipe and Magnaflow straight-through mufflers for a while. When I deleted the secondary cats it made the exhaust note more screamy/raspy on the higher end. I absolutely love it.
Member
Joined: Nov 2010
Posts: 197
Likes: 1
From: Australia
C220 CDI SLK 200
Installing mods to make your car noisier is fortunately verboten where I live. People who do it are slapped with a defect notice which can not be removed until the car is inspected. So those people who install what we call fart cans just to make people assume that they have also purchased penile enlargers are quickly disillusioned and returned their cars to normal. Getting your car back on the road is a long and involved process. So long and costly in fact, people just abandon their rides and purchase a new one
MBWorld Fanatic!
Joined: Aug 2009
Posts: 1,134
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From: Charlotte, NC
2015 BMW M235i 6MT
Yeah it all depends. Replacing the resonator with an x-pipe and deleting the secondary cats BUT leaving the stock mufflers will make the exhaust meaner and not produce any drone. If you have the above and replace the stock mufflers with straight-through mufflers, there will be highway drone.
I had highway drone with just an x-pipe in place of the resonator and straight-through Magnaflow mufflers.
Went back to stock mufflers and deleted the "2nd cats" and I'm enjoying a no-drone exhaust with a mild but louder than stock sound.
Junior Member
Joined: Mar 2023
Posts: 43
Likes: 1
W204 c350 coupe, w218 cls63s
Good deal
My story, went to the shop, installed my own xpipe 100$, drove one day, i barely heard any difference with xpipe, came back to the shop second day and deleted second cats 100$.. if you do everything at once it should be maximum 150$. Less then 30 min job. No errors. Sounds much more better then just an xpipe. Cold starts will be loud for like first 10 seconds then it calms down. No drone also.
