B R

I've been searching, but haven't found anything. I was looking under the car & I'm confused about what you guys are calling the resonators vs mufflers. To me it looks like there is a pair of resonators in about the middle, then a muffler looking can in front of the rear wheels & another muffler looking can right by the tips off to the side. Thanks .

andy_meng1024

Mufflers are the ones connect to the tips and resonators are the ones before that.

andy_meng1024

If you must have a picture...

B R

Thanks Andy, the pic was very helpful & you are quite the Picasso . I guess I thought the 2nd cats were resonators, so now I'm straight about what everyone is eliminating.

Sunir

hahaha LMFAO!! .... the 2 cats are close together...then the resonators then the rear mufflers...most people gut the resonators, some go on to gut the cats as well...i dunno anyone whose gutted everything most leave the amg mufflers as they are straight through free flow units anyhow.

cal1

How about this:

cal1

Some remove both the 2nd cat and res. I removed the 2nd cat and had a piece of 3 inch stainless "U" bend cut and welded in place. If you look at the drawing you can see how a piece of "U" bend can be cut slightly off being in half to fit the two slightly different spaces where the 2nd cats were.

B R

Even better . I wonder how loud it would be if you eliminated both mufflers & kept both cats? Seems like I could shed a few pounds of weight at least.

cal1

not sure. i don't know of anyone who has done it. You might ask the "E" guys. They are the biggest mod bunch. The "E" exhaust is a bit different though. At least I think so.

Sunir

mufflers in the SL do not weigh that much...not nearly as much as they do in the E55. They are smaller and more compact in the SL55. Also the main weight of the exhasust is supported by those hangers back there on the factory units and there is zero performance gain to be had from deleting the rear mufflers since they are straight through designs. I looked into eliminating them or replacing them at one point...but chose against it...

Havoc

I did the resonator delete and gutted the stock AMG mufflers. I originally wanted a very loud exhaust system, but it droned way too much mainly from gutting the mufflers. I will be selling them soon if anyone wants them.

I now want a mild, but deep exhaust tone with zero drone. Evosport is building me their custom longtube headers, racing cats, X-pipe, and into new stock AMG mufflers. I think this will give me the performance and sound I'm looking for.

M3nv

Judging from this image, the resonator is the same thing as the 'center muffler'?

[/QUOTE]

jmf003

Yep! #159.

jrgator

I just removed my resonators, Cheap and quick, and I kept them if I or the subsequent owner want them reinstalled. At constant speed, there isn't much change, but under acceleration, especially under WOT, you can certainly tell the difference. Exactly what I wanted because I didn't want a drone or something too loud.

Sharkster

I really would like to see some performance stats of your car. I know, we all assume that there isn't any performance gain from this step anyway, but could there even be a decrease in power, if you remove the res and gut the mufflers?

I was once told that the whole system is very fine tuned and that removing parts is a "no,no!". In theory the removal of the resonators and mufflers should let the engine "exhail" more freely, thus resulting in a slight performance gain. However, in practice there are some people who claim that the engine "needs" some resistance in the exhaust strain... This (should be) particulary true for the SL55.

Any thoughts on that?

Havoc

There wouldn't be any decrease in power doing the resonator delete and gutting the stock AMG mufflers on an SL55 because the resonators and mufflers are a straight through design and have no resistance to begin with. When I removed the resonators I could see straight through them as they are totally open. The mufflers had no baffles in them. They both muffle the sound and keep exhaust noise down.

I understand that the whole system is very fine tuned and that removing some parts is a no, no. The cats are restrictive which keeps the torque in place a certain RPM's. Removing them will increase HP in the high RPM's, but you will loose some torque in the lower RPM's.

Sunir

Havoc is right...the mufflers are straighthrough you can look thru them no restriction, as are the resonators...these divices appear to be there to dampen sound by absorbing a percentage of the wave pulses as they pass through the chamber. I don't know of any performance gain having them on or taking them off I just think the sound gets higher with them off due to less cancelation of pulse waves.

M3nv

How much should i be expecting to pay to have them removed?

jrgator

I paid $75, and the result looks very good, too.

M3nv

Thanks, i'll call around this weekend and see if I can get a similar price. Im getting giddy just thinking about it!

Were the resonators easy to access? Will they have to lower the exhaust to get the weld perfect?

jrgator

Very easy access. They removed nothing and didn't have to lower the exhaust. Everything stay the same such as the hangers. If they do a good job with the bend, they go right on.