Savage-wp

On my previous car, which was a 6 litre Chevrolet Lumina (Pontiac G8) I played around with different exhaust configurations. I found that when I used an X-pipe I gained power on top. I then switched to an H-pipe, and lost the top end, but picked up at the bottom to mid. I then ran an X and an H together and I gained top and bottom.
We have had similar results playing with my friends BMW V10 M5. Best result was X and H combined.
Anybody done testing on the C63 with an X and H combined, versus just the X or the H.

Mr. Lin

so would you swap the 2nd cats with an H and then X the res?

Savage-wp

That was what i was thinking of doing.
Fitting the H-pipe in place of the secondary cats, and the X-pipe in place of the resonators.
From what i have read on these forums, most of the guys do the one or the other.

AMG3.2

Very interesting...

C SEXY 3

I really searched hard to find this video haha, I remember watching it a while back but couldn't remember the name for the life of me. But here I found it lol.

Savage-wp

Interesting video. Thanks Crazy63amg.

Mr. Lin

and there's prolly an equal amount that just straight pipe the whole thing.

ArmoE55

I'm sick of researching what to do with the exhaust. I absolutely HATE rasp, so eliminating cats without getting rasp is difficult. Need to add some 100-200 cell cats in place of primaries or mids to keep it to that deep AMG signature sound.

The best thing I've heard so far was an Xpipe in place of secondaries and straights for the res. But I haven't thought about an X in place of secondaries coupled with an H in place of res, might make it even deeper and throatier without adding more rasp. Just a significantly louder stock sound on mild and WOT accelerations.

OP-
You should be the guinea pig and report back with your results for us!

Savage-wp

Definitely. Seen a few guys who just say to straight pipe it.
But, the X and H were better than straight on my previous car.

AMG3.2

I've got an H pipe and secondary cat delete, but I just want it louder. It's still way too civilized... Ugh.

marcadelic

same here, honestly I'm thinking about doing a muffler delete to hold me over till I get headers but I think it'll be too raspy (not worried about the drone)

ArmoE55

I'm going with Mike's H pipe and Mike's resonator delete(replaced with straights) setup. Will report back when I get they installed (will probably be a while).

63 Molar

Ok
Better to replace the secondaries with H pipe, better responsiveness and torque in the lower RPM and retains the signature AMG bark.
X pipe is better for higher RPM and gas flow, but will loose the AMG sound that we all love

Replace resonator with straight pipes - awesome
at idle no difference
WOT - awesome and loud
See Mike's power pipe - totally awesome

If you doing primaries - long tube headers with X pipe seems to work better then straight pipe the resonator.

Savage-wp

Thanks for the info. So your findings are similar to what I had on my previous car.
H-pipe gives low end and mid range.
X-pipe gives top end.
But doing the X-pipe changes the sound and you loose the signature AMG sound.

I'm looking at bringing in some Headers to South Africa. So a set of long tubes, then the H-pipe to replace the secondaries and X-pipe to replace the resonator.
I reckon it should make good power and sound mental.

ENV²

What happens with straight pipes? As far as the responsiveness and tq?

deadfission

I know we all love Mikes Power Pipe and I'm sure it's an amazing product but do we have any other sources for an H-pipe that maybe doesn't cost me my left nut?

BLKROKT

Midas. Meineke. Honestly, any decent muffler shop will make that for 100 bucks.

C SEXY 3

Go to any performance exhaust shop and they can make one for you.

deadfission

Anyone know a good one in Atlanta? Buckhead Imports Performance closed on me and now I feel lost & alone.

BLKROKT

Any decent muffler shop dude, just pick one with good reviews online. It's not hard to make.

deadfission

DO THE WORK FOR ME!

C SEXY 3

Performance Exhaust  
4.3 out of 5 from 8 Google reviews
Address: 2220 Lawrenceville Hwy, Decatur, GA 30033
Phone: (404) 636-4095


There you go.

C SEXY 3

or

Eurotech Performance Group
4.8 out of 5 from 6 Google reviews
Address: 12 Scott Dr SE
Phone: (770) 977-1090

deadfission

Hahaha. I was joking but thanks! I was planning on using Solo Motorsports regardless :P

marioflex

I just bought 3 inches pipes a 3" X from Vibrant and have a good welder doing my exhaust. I have no cats and use stock mufflers for the street. The car sounds fine but pretty loud in WOT. I have cutouts for track use and when open it really sound loud.