darwin329

Hi anyone here deleted the resonator on the Performance exhaust system of 63s. Any improvement or does it make it loud? Any experience losing power/torque or drone. I know downpipes is the way to go for louder exhaust note am not just ready to pull down the Trannie. Appreciate inputs. Thank you

Vic55

Good question- Ill say this; on my M157 engines, pulling the resonator gave me about 20% more sound at WOT but not really any drone and no loss in power. I do think a resonator removal on the C63S with the PE would be a nice add to an already strong exhaust system.

Disclaimer: Drone is subjective

Sanch

Thank you for the info Vic.

I might be looking at this route to begin with and if I'm not happy will end up going all out and doing the DP and the tune at the same time.

darwin329

thanks for the info VIC.. when i remove resonator should i do Xpipe or straight pipe What do you mean by PE and WOT ? hehe

darwin329

Hey Sanch let me know when you do it. am not so familiar with the exhaust system, so when you remove the resonator are they being replaced with straight or X pipe

Sanch

Hey, they are cutting/ deleting the resonator.... If you want after that you can add a straight or x pipe but that involves changing the exhaust. I like the performance exhaust, just feel its way too restricted from the down pipes. Deleting secondary cats will help the sound.

Ps: Secondary cats on this car is at the end of the down pipe and not the x pipe from what I'm told.

Vic55

On all my resonator removals (2010 E55, 2012 CLS63, 2012 E63, 2012 C63BS, and 2013 SL63) I went with straight pipes. I havent been under my C63S yet but hear that there is an H pipe already there (could be X) so ill consider only a straight pipe once I review it.

darwin329

i just spoke with another c63s owner with stock performance exhaust. He said our car doesn't have resonators?????

darwin329

Thank you. right now am confused, another c63s owner mentioned theres no resonator for the c63s

kuba.95

It doesn't have a resonator. Just mufflers, primary cat, and secondary cat.

Vic55

Well since I hadn't been under the car I didn't know if there was one or not and there isn't one on my GTS so that kinda makes sense. (resonator) Or does the coupe differ from the sedan??

When said PE that was short for Performance Exhaust and WOT is short for wide open throttle or basically mashing it!!!!

I'm a little bummed there is no resonator because I want just a bit more sound from the car but there is no way I'm going aftermarket or even dp's at this juncture. Its just really good already so its just time to rip her.

OrientBlue3

Had this same idea, went to the exhaust shop last week and found out no resonators! I was bummed because it was such a great mod on my W204 C63 and my W212 CLS63!

UGOTMOPPED

The performance exhaust DOES NOT HAVE ANY RESONATORS.

I just gutted my secondary cats. I might put some vids up. Not sure yet

NARCOGP

Dooooooooo it! c'mon

black63s

How much did it cost you to have this done and what was the time required for doing this?

rmt52

where did you go to get the secondary cats removed? was there a noticeable difference in the sound of the exhaust?

AMG 17GT

Very limited options on these.

Andyroo

To clarify, the sound reduction in the standard W205 C63/S is:

turbos -> primary cats -> secondary cats -> valved h-pipe -> rear mufflers (valved on performance exhaust)

Options to make louder are to remove one or both cats and/or the rear mufflers. Because of the turbo adding silencing, removing the secondary cats on the W205 is akin to removing the resonator on the W204 (which went primary cats -> secondary cats -> resonator -> rear mufflers)

rbohgan

i pick my car up shortly looking at modding exhaust too...did anyone do the secondary cats and have a vid handy? that wont throw a CEL right?

Andyroo

I've not seen a good vid of a secondary cat removal. It shouldn't throw a CEL though as it's after the sensor.

rbohgan

hmm ok im contemplating it but yeah i havent seen anyone do it yet. so who knows how it will sound... it worked well on the last gen c63. did it on that and sound was epic

AMG 17GT

According to another GT owner second "cat" after bend was removed and was just a resonator, no platinum. Says more sound no drone.

rbohgan

so he is saying the second cat is just a res? hmm i might just need to visit an exhaust shop to be sure here. from reading this forum people were saying there was no res on these cars now.

Andyroo

I'd be surprised by that. Most modern cars have two stages of cat, with the second being for cold start emissions. These secondary cats are usually a lot less dense so they can get to operating temp quicker.

Andyroo

People who've done it say it sounds similar at idle but louder and harder edged at full throttle.