2015 Mercedes-AMG C63S Secondary Cat Delete

Nov 19, 2015 | 11:09 PM

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

2015 Mercedes-AMG C63S Secondary Cat Delete

Damn the secondary cat delete made quite the difference! It sounds extremely good when revving the car, or driving it in the city, but at highway speeds/high revs it sounds ever better!

Cold start video! (Ignore my dads loud breathing lol)-

Revving video!-

Nov 20, 2015 | 08:55 AM

V8BiturboAMG

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From: Staten Island, mostly Brooklyn

C300 AMG

That sounds so good, that's how it should have came from the factory. Is it any louder in the cabin?

Nov 20, 2015 | 09:16 AM

jeremyf0923

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From: St. Louis, MO

2021 GLE53; 2018 Audi R8 V10 Plus

Sounds great! What was the cost to do that? And is there any downside to this mod?

Nov 20, 2015 | 10:22 AM

marcolarco52

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homeless

Quote:

Originally Posted by jeremyf0923

Sounds great! What was the cost to do that? And is there any downside to this mod?

Only negative effect of an exhaust mod would be drop in MPG due to keeping your foot on the throttle all day long to hear it.

Nov 20, 2015 | 11:10 AM

JPMBenz

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From: NJ

17 C63 S Coupe

This is the essentially the same as a Mid-Pipe; correct?

Nov 20, 2015 | 11:17 AM

M177fanatic

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C63S

finally a video on an exhaust modification, these type of videos makes me want to get one of these

Nov 20, 2015 | 04:12 PM

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

Quote:

Originally Posted by V8BiturboAMG

That sounds so good, that's how it should have came from the factory. Is it any louder in the cabin?

Well it already came from the factory without a resonator, and it already has cutouts which partially bypass the muffler so AMG already did a lot that you'd usually have to remove on your own for most cars.

In comfort mode it's still quiet, and luxurious. You just hear a tiny bit of that V8 rumble (More aggressive rumble then before). In Sport+ and Race mode it is quite a bit louder if you give the car gas, and the car makes popping and crackling and all those lovely sounds a lot more. So it's definitely louder in the cabin. Especially at the 4k and above rpm range. Also the best sound is in 5th gear when you're going 110km/h and you accelerate. Sounds so beastly during that!

Quote:

Originally Posted by jeremyf0923

Sounds great! What was the cost to do that? And is there any downside to this mod?

$300 Canadian since it had two secondary cats instead of 1. Only downside is you lose a bit of backpressure therefore you lose some power at the lower range (It's so miniscule you don't even notice), but in return you get a lot more sound, and you get more power at the higher rpm range. To avoid the loss of backpressure though you can get xpipes instead of straight pipes, but you'd get a bit less sound then.

Quote:

Originally Posted by marcolarco52

Only negative effect of an exhaust mod would be drop in MPG due to keeping your foot on the throttle all day long to hear it.

Haha true! Only other possible negative is that the neighbors will hate you, that is if you care what they think lol.

Quote:

Originally Posted by JPMBenz

This is the essentially the same as a Mid-Pipe; correct?

I believe it's similar since most aftermarket mid pipes get rid of the secondary cat, and the resonator.

Quote:

Originally Posted by M177fanatic

finally a video on an exhaust modification, these type of videos makes me want to get one of these

The car sounds amazing stock, but this makes it sound a lot better! Still thinking of getting a exhaust cut out that fully bypasses the mufflers instead of partially bypassing them like the stock ones do, but I think that could possibly make the car a bit too loud.

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Nov 20, 2015 | 10:31 PM

jeremyf0923

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From: St. Louis, MO

2021 GLE53; 2018 Audi R8 V10 Plus

One more question - does this mod negatively impact manufacturer warranty or annual emission check?

Nov 21, 2015 | 12:07 AM

#10

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

Quote:

Originally Posted by jeremyf0923

One more question - does this mod negatively impact manufacturer warranty or annual emission check?

I believe it impacts the exhaust or the catalytic warranty. Dealership said not worry though since as long as you don't loose to much backpressure you're fine since it won't cause any damage to anything. As for the emissions... It coulda affect that since the secondary cat cleans a tiny bit of the emissions (5% if I remember correctly), but you won't get a check engine light since the emission sensor are before the secondary cat.

Nov 25, 2015 | 10:30 AM

#11

rmt52

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From: Chicago

2016 C63 S, 2011 C63 R.I.P.

do you have the performance exhaust or the regular exhaust?

Nov 25, 2015 | 04:33 PM

#12

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

Quote:

Originally Posted by rmt52

do you have the performance exhaust or the regular exhaust?

Performance exhaust

Nov 26, 2015 | 01:12 AM

#13

Nadli34

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2015 C63 amg s

Where are the secondary cats?

Nov 26, 2015 | 05:12 PM

#14

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

Quote:

Originally Posted by Nadli34

Where are the secondary cats?

It's just a bit after the sensor after the primary cat. Don't have a exact location though.

Nov 26, 2015 | 06:08 PM

#15

Nadli34

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2015 C63 amg s

Quote:

Originally Posted by kuba.95

It's just a bit after the sensor after the primary cat. Don't have a exact location though.

Is it on the down pipe? or is it on the mid pipe?

Nov 26, 2015 | 06:21 PM

#16

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

Quote:

Originally Posted by Nadli34

Is it on the down pipe? or is it on the mid pipe?

I believe that the secondary cats are on the mid pipe, while the Primary cat is just after the downpipe or at the downpipe.

Nov 26, 2015 | 06:26 PM

#17

Nadli34

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2015 C63 amg s

Quote:

Originally Posted by kuba.95

I believe that the secondary cats are on the mid pipe, while the Primary cat is just after the downpipe or at the downpipe.

Alright thats good to hear. Thanks

Nov 30, 2015 | 12:44 AM

#18

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

The sound that a decated C63S makes when upshifting at 6500-7000 rpm is absolutely insane!!!!

Nov 30, 2015 | 12:17 PM

#19

kb24forlife24

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From: SoCal

None for now

Post more videos!

Nov 30, 2015 | 05:34 PM

#20

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

Quote:

Originally Posted by kb24forlife24

Post more videos!

I'll probably record a video or two on Friday when I'm hanging out with my friends, and probably post the video/videos on Friday night or Saturday morning.

Dec 1, 2015 | 06:28 PM

#21

Sanch

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From: Sydney

AMG GLC63 E-Performance Edition 1

Sounds great, might have to look into doing this to mine too!

Dec 1, 2015 | 06:36 PM

#22

Nadli34

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2015 C63 amg s

Getting mine done tomorrow morning! I'll take some videos asap

Dec 5, 2015 | 03:48 AM

#23

kuba.95

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From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

The phone doesn't pick up the sound too well, and the videos don't do the sound justice at all but here are two anyways. If I ever get my hands on a go pro or borrow one from a friend then i'll make a gopro video. Hopefully that would pick up the sound properly cause there's a huge difference between stock, and secondary cat delete.

Dec 5, 2015 | 06:58 PM

#24

westwest888

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From: San Francisco, CA

'15 Boxster, '10 S4

This seems like it's really illegal in Canada. You won't pass visual smog inspection in California. The only way to avoid it is if the car is so low that the guy can't tell. I'm talking like under 4" off the ground. They don't have lifts at the smog check places.