I searched quite a bit but was 100% sure on the stock exhaust size on the 2014 E550.

It looks like the stock size is 2.5 inches.

Can anyone confirm this? I'm looking into getting an exhaust cut out.

Thanks

 

I would answer, but I have a 2012., 2014 has a different exhaust (twice the amount of catalytic converters). On mine the outlet is the same as the rest of the rest of the piping. Leave your resonators in, mufflers out. You will thank me later.

 

Yea my research was leading me in the direction of keeping the resonators in. I just want a little extra noise sometimes.

 

Then you probably seen my video. I had just done the exhaust work.