Muffler delete back to factory muffler
And this is my c43 with a 5.4 swap and resonator delete. The e class probably has a more sound proof cabin.
It might be too quiet for you.
BTW, you 55-swap to C class has to be a beast! What year is it? My daughter drives a 1997 C230...might need to put a 5.4 in it...haha!! I'd love to see some pics and/or videos if you have some.






