If it were me, I'd just take the mufflers off, and leave the cats and resonator. I've experienced that setup on both my old Mustang GT (whatever anyone's thoughts on Mustangs are, I think it's widely accepted that pretty much any V8 variants are the best sounding cars on the road) which sounded out of control, and my friends old S500. Sounds deeper than any other setup, and the cats and resonator keep it relatively clean sounding.

Anyway, that was my weird little experiment. Performance wise, we both noticed a loss of Torque and horrendous Gas Mileage. I'm no expert, but I'll wager taking the resonator and a set of cats off will probably lose some down low as well, especially on a high-ish revving 4V V8 like the 6.2.

 

geez.. so much stuff going on, i'm lost. so what wa the final consensus? X pipe up front, remove resonatators and second cat, right?

is it this one
http://www.summitracing.com/parts/MPE-10792/

did you need any other parts, clamps, etc?

 

Thats the x-pipe. I had my 2nd cats cut off right before the small h-pipe and right after the cats. I replaced that section with the x-pipe (they will have to use some 3" pipe to work the connections). Then I had my resonators replaced with 3" pipe. If you search you can find pictures on the W211 forum of others who have done it.

 

Is there any difference from the w211 e63 to the w212 e63 exhaust

 

I hear its the reason why we get 11 or so more hp than the W211--- less restrictive.

 

is the x pipe from summit the correct size? also i thought we got the 11 hp from the mct

 

Transmission doesn't add any hp at the crank.

 

Guys I'm going to do this setup for my car, where do I order the proper parts. I need to know asap.

 

I went back to my muffler guy and he didnt have the right x pipe at the resonator level so I didnt get it done. Im worried that Summit's x pipe will not be wide enough (from tip to tip in the front) since the cats are spread out wider than the resonators. I might have to go custom.

W212's are different than W211's.

 

A good shop will custom fit the magnaflow x-pipe, they need to fit it with some 3in pipe on both ends.

 

They were worried about bending the pipes from the manifolds too much--- he didnt want to be responsible for snapping anything. He checked the flexibility of the pipes and said there was not that much play.

Do you have a W211 or W212?


Edit: I just saw your sig.. W211- different exhaust set up no??

 

Do we have have similar piping as the c63, The guys at my shop told me they could use 2.5" piping and expand it to fit..

 

I dont know if they are different? They unbolted my exhaust were the headers meet the primary cats and in the back, to cut off the 2nd cats. Then they bolted everything back up so they could fit the pipes.

 

I hear the exhaust is slightly different- I just have never been under a W211 to verify but from what I read the exhaust is different and thats where the 11hp gain comes from

My guy was willing to straight pipe the cats but that would cause a loss in power.

 

I had straight pipes in place of the cats and did not like it (i felt some low end loss)! Put that x-pipe in it will feel a lot better, it feels like I picked up just a little more on the bottom end.

 

So whats the final outcome? I want to do this ASAP. I think I'm gonna stop by the shop next week. Guys anyone who did the setup, can they please pm me with details. I want the job to be done right so I'm going to watch them put the exhaust together.

 

Look how nicely done the evosport exhaust is done

http://www.evosport.com/product/prod...O.EXH.M09.63BS

 

I think why it feels like you would loose power because there is less back pressure because of the straight pipe. The X pipe creates more back pressure which gives you more low end torque. The straight pipe would give you more top end power.

 

with the secondary cats deleted give it about a week and SHE will be louder all the way through but not loud enough to become annoying in the cabin.. its only at WOT that shell get LOUD.. but thats a good thing

 

Hi guys !!Just joined the forum! Hows everyone keeping? Im from South Africa & drive a 2007 w211 E63. With regards to the exhaust discussion, i felt the car was not loud enough , so i contacted Sportech SA , a Reputable tuning company, told them i want more power, more sound & not have any issues with motorplan/warranty, they suggested opening up the secondary cats on the factory welds and removing the insides. same with the baffles in the rear mufflers. So the exhaust looks OEM when its in for service, but basically more free flow. They quoted me an 11 k/w power gain. ( 14.7 hp ). any one tried it?

 

SuperSprint is going to be dropping a FULL Exhaust for the W212 E63 at the end of this month. This system should be LEGIT! I cant wait!

http://www.supersprint.com/USP000mer2121.asp

 

Soo pricey tho for Supersprint exhaust pipes and mufflers. I found out about Pepe's new muffler place in LA. Might just take my car to get custom setup. Replace secondary cat and resonator with 3inch X-pipe to OEM mufflers. Anyone know if Eisenmann will make a RACE muffler for the W212 E63?

 

So confused. Can someone make a quick drawing in MS Paint and post with some text of what parts needs to go where? Much appreciated...

 

Thanks for the info guys. I am also interested in a sound upgrade without doing anything drastic or reducing the power.


Vic or any other w212 owner that has done this resonator removal + sec cat to xpipe conversion, would there be any chance you can post a picture of how the car looks from underneath now?

Thanks a lot!

 

If anyone is interested, I managed to sneak in a photo of my car from below when they were doing routine maintenance on it the other day. Heres a pic:



I dont know what im looking at though cause im a complete noob