350Zed

Hey guys,

I just did a secondary cat delete and had a Eurocharged x-pipe put in, and I'm not too happy with the new sound.

It's got a hollow tone to it now under part throttle that reminds me too much of the stock VQ exhaust in my old 350Z.

Any thoughts on keeping the increased sound volume, but lowering the tone to a more "muscle car" like sound?

I'm debating a resonator delete (replace with straight pipes), but I'm afraid that will drive the sound in the wrong direction, and most YouTube videos I've found aren't giving me a great representation.

Thoughts/help?

Adi-Benz

https://mbworld.org/forums/c-class-w...flers-etc.html

roadkillrob

Might want to try this, put the cat back and do the powerpipe resonator delete either with the h pipe which is a little quieter or the straight pipes for a little more bark

https://mbworld.org/forums/c63-amg-w...uy-thread.html

Jasonoff

That's a non AMG thread. Does not apply here at all...

MJames2

just leave the res and put a set of straights where the x is ...it sounds amazing and if that isn't loud enough then maybe buy headers

but straight pipes are pretty loud honestly

Adi-Benz

Understood, but they also go through the parts in the thread and describe what they do. The video's themselves won't help, but there is some relative information that will. Also you can find the C63 variant on some videos, if you look them up.

Jasonoff

It's a completely different system for a completely different engine.

There's a decent thread in the FAQ sticky

https://mbworld.org/forums/c63-amg-w...info-noob.html

kjkidd21

Do what he said. Straights sound much better than x-pipe. Mike's Power "H" Pipe is what you want...

C63amg Tokyo

I agree, get rid of the x-pipe. Put in straights. Do not remove the resonator.

Jasonoff

The H tames it down a bit. Makes it less raw which may be perfect for the OP.

marcadelic

I replaced my secondary cats/resonators with straight pipe + an h-pipe. Sounds very similar to stock just louder.

I think that will give you the sound you're looking for:

Jasonoff

Can you clarify which is where? It believe it makes a large difference if the H is closer or further from the engine.

Secondary Cats replaced by ___________
Resonator replaced by ___________

This also removes the X where the resonators are which slightly changes the sound harmonics (not amplitude) as well.

computertom

I usually ignore all of these exhaust threads, but that does sound awesome. And I really wish AMG hadn't added more sound deadening with the FL. I really preferred the PFL noise in the car (can't put the seats down as the kids and their car seats wouldn't be too psyched).

RamezPower

Are there any straight pipes and h pipe you guys recommend? Are they just bolt on or is cutting and welding required? Looking for a similar setup but want something that just bolts on if possible. I really want just headers but cant justify paying and arm and a leg for them.

jptaylor

No doubt, best sound possible imho...I have no seconds, reso in place and no back boxes

350Zed

Anyone have a sound clip of secondary cats replaced with straight pipes? or h-pipes?

I'm finding YouTube searches do not come up with any good examples of this specific setup.

jptaylor

This is no 2nds, x-pipe in place of reso and no back boxes

https://youtu.be/D-joB5dh7DQ


This is same as above but with reso back in place of x-pipe(current setup and one I'll keep for good)

https://youtu.be/8MUg2zPhXqY

350Zed

Thanks!

Too loud for my taste, but I appreciate the help.

marcadelic

sorry I should have stated that, I replaced the secondary cats with the h-pipe and the resonators with straight pipe.

However that video is not of my car so I'm not 100% sure they did the same as me. It does sound very similar to mine though.

simandang

I just replaced the secondary cats with straight pipe and kept resonator and it sounds pretty good. Pops more and louder at WOT and no drone whatsoever. In fact the cold start is same as stock I am pretty sure.

I wish I had replaced the resonator with the straight pipe too as I think it would sounded perfect then.

KINGPIN 007

one of the best sounding setups is the following

Remove your secondary cats
Remove your resonators
Replace secondary cats and resonators with an H-pipe
Keep your primary cats

This setup is great for cruising as there is NO drone and the cabin is extremely quiet. And when you want to smash on it, you get to hear the roar only then, so best of both worlds. Also, i love the snap, crackle and pop of the back fires as you come down the revs

dubzAMG

Take out the X pipe, put in mikes power pipes (straights) you will get the AMG bark back.
Keep the stock resonator, it has an H already built into it.

I currently have LTH/X-Pipe, resonator delete, akrapovic slip on. I will eventually remove the X and replace with straights.

Kriston

I had the resonators and secondary straight piped a few years back. Best choice. The X Pipes as others mentioned actually tones down the sound.

sujohn

Here's another video of secondary cats removed and replaced with straight pipes:

evd

sounds good, so just cat delete, left the resonators on hey?