Yesterday the muffler on my 98 E300 fell off. So I went to the exhaust shop I've used for years and, not really having the time to source an OEM muffler and wait for it to come in, opted for a Magnaflow....$200 out the door.

Now driving the car I notice an odd sound, kind of a "whooshing," at around 2300 rpm as I accelerate. At first I thought that this might be some sort metallic resonance or the sound of the turbo. But with my son riding in the car he seemed to think it was coming from the rear...which has led to a new theory.

The original muffler had two pipes; the new one has only one, and it curves down. Is it possible that the sound I'm hearing is due to air constriction or the flow of the air out of the pipe? that, as higher exhaust volume is being forced out the one pipe, it's making the whooshing sound that I'm hearing?

If it's simply a matter of a new occasional sound, it's not a big deal. It's my son' DD and he doesn't care about such things. I'm more curious than anything else.

In retrospect, I wish I had just driven a muffler-less car for a while and ordered the Mercedes part....only $300 or so.

Thanks.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 179k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 77k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife