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Old 12-04-2008, 03:36 PM
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Holson Adi Holson Adi is offline
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Join Date: Jul 2001
Location: Boston, MA
Posts: 2,561
190E 2.6L exhaust modifications (m103)

OK my 190E's exhaust is droning at highway speeds and at low rpms it's got an annoying rumble (not the nice kind from a V8 - just droning sound). It's just an awful sound.

My guess is there's a hole in the exhaust system somewhere. The valve seals were also replaced recently since oil had been going into the combustion chamber at a rate of 1 qt / 300 miles. My guess is the cat(s) arent in the best of shape anymore.

As such I would like to just upgrade it with newer stuff

can anyone shed some light as to what the stock 2.6 exhaust is like?

It looks like it's the following (in order from engine to exhaust tips)

6 to 3 to 1 manifold
a small cat conv. (pre-cat?)
a bigger cat conv.
a resonator
the rear silencer

I wanna start at the front. I don't think there exists a header for the 2.6, so I'll just start with the cats.

Does anyone know which high flow cats can be used with this model? Ive been looking at the magnaflow ones but not sure which ones will fit.

I'm guessing the exhaust shop would have to cut a hole into the universal high flow cats to put in the O2 sensors right? (which Im sure I want to replace while they are out)

thanks in advance!
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