sujohn

That's correct, resonators and everything else is stock.

computertom

That is a ton louder than stock eh?

Also, what exterior do you have to go with the Designo Sand leather int?

-Tom

sujohn

If I had to quantify the loudness, it's about 10-20% louder under 3000rpm and maybe 30-40% louder at higher rpms. Cold starts are 30-40% louder and there is more pops and cracks when you lift off the gas. Part throttle behavior is nearly identical to stock. This is a no brainer with no downsides I can think of.

Just a black exterior because I am a glutton for punishment!

velic63finland

This is mistake. You have to leave empty cats in car. I have empty secondary cats but leave that orginal system. Just drain original cats.

Jasonoff

You don't legally need them anywhere in NA since they're past secondary O2. So hollowing out (if that's what you mean by drain) the secondary cats is a huge waste of effort.

velic63finland

I mead you should delete secondary cats inside but live the orginal "box". Sorry. 😊 If you put straight pipe exhaust noise is horrible. But left original "box" but empty.

Jasonoff

Do you have a sound clip of hollowed out secondary cats? How did you remove the material?

Derekm15

What's the benefit of going from x pipe to straight pipe?

jptaylor

The x-pipe KILLS a LOT of sound in the exhaust due to cross canceling the exhaust pulses against each other....I replaced the reso with an x-pipe and it sounded like ****(like a 19yo's Z71 with 'pipes leaving high school)...never seen the reso cut open but have heard from numerous sources that it is an h-pipe internally...and to be honest I fully believe that the AMG bark does in fact come from the reso....when I put mine back in and before I removed the back boxes I got the bark back

MJames2

guys just delete your 2nd cats and place straight pipes in and leave the resonator ..no need to gut your cats

Derekm15

Very intreating on what car? My friend has xpipes both cat and res delete on his c63 I wonder how different it would sound. It does sound really nice at the moment not much louder then stock.

350Zed

I'm going to try keeping the x-pipe (where the #2 cats were) and replacing the resonators with straights.

That's the recommendation of the guy who did the x-pipe in the first place, so I'm going to give it a try.

MJames2

don't bother you'll hate how the car sounds without a res

just remove your x-pipe ..replace them with straight pipes and keep the res then be done with it

jptaylor

This guy's on point!!!

AMGC

this is because you added an X pipe when
the resonator acts as the X pipe. Its that simple.

jptaylor

Oh no, the resonator does NOT act as an x-pipe....the resonator acts as an H-PIPE....and there is HUGE difference between the two.... C63 resonator internal

350Zed

Update... chickened out and went back to stock (ie removed the x-pipe and put back the secondary cats).

I'm WAY happier with the stock sound.

Chalk this one up to a bad idea.

Kriston

Straight pipe it all.

Eurocharged Canada likes to sell X Pipes because that's what they have pre-fab'd for install.

Straight pipe all the way back is the best overall sound / performance out of the stock AMG mufflers IMHO.

ML63 AMG

Memorial Drive lol ... Recognized that route immediately, done it a 100 times.

ArmoE55

Let me preface this by saying, sound volume, pitch etc varies from person to person depending on taste.

For me, an xpipe is a no-no on this motor because it kills the beautiful roar of the 6.2l. Secondly, the type of sound you want will dictate next steps. I wanted several notches louder, but stock sound. I went with Mike H pipe replacing the secondaries and his resonator delete pipes, which are straight pipes. I honestly couldn't be happier with the sound. The signature bark is still there, but the loudness makes it seem like it isn't there. It is fairly stock sounding on normal cruising, and a complete animal on half and definitely on WOT- which is exactly what I wanted. MY ONE AND ONLY DILEMMA NOW IS: should I do long tubes or not, which will make the car INSANELY loud , especially very cold starts.

others straight pipe everything and it's loud, but not for me.

To reiterate, it's all about personal taste. Good luck.

ZephyrAMG

In my opinion, I think those that said just remove the secondary cats are right on if you want just a louder version of classic AMG rumble. Removing 2nd cats and straight piping to resonators.

Keep resonators. It contains a small H pipe inside, for a reason. Keeps the classy, "still take your girl to the restaurant" but now a lot louder WOT bark.
If you want to still take the car out and valet, drive down the neighborhoods and downtowns, it keeps her nice and classy. Then when you hit straight ways, let her rip.

If you remove the resonator you are hacking up a high quality beautiful OEM exhaust and getting that cheap rasp. Our exhaust welding and quality material is second to none.


KEEP resonators. Just delete secondary cats.

kjkidd21

It seems as though the majority of members are giving this^ same advice and there is a reason that most people tend to lean this^ way. The reason is exactly as Zephyr laid out - quiet when you need it to be & loud when you want it to be. Use a Mike's Power H-Pipe to remove your secondary cats and leave everything else as-is.

INS1GNIA

Beautifully said!

drawde

i replaced my 2nd cats with an x-pipe and wasn't a fan of the sound either. i ended up going straight pipes at the resonator and liked it much better.

RJStanford

Yup. The stock resonator H-Pipe AND an X-Pipe makes very little sense.

I replaced the resonator with straight pipe and the sound was way too truck-like. Swapped in a small H-Pipe to match the one that's inside the resonator and was much happier.