[djgreg1200]

I really want to do a muffler conversion on my 2018 330 Im looking to go from the single side muffler to a dual side muffler like on the 340. Anyone know any shops in the Baltimore/DC area that can do this kind of work?

[mat9]

I did a conversion to m2 quad exhaust a couple of years ago with the help of a muffler shop and then a body shop to fix the bumper. Doubt any one place is going to be well equipped enough to handle both.

[greyf36]

i just did that and it really depending on what you need, are you staying with stock muffler? or something else? I am pretty sure any aftermarket axleback from the 340 will fit the 330 and you dont need any custom work

[rohan430i]

Take a look at this video - doesnt need to be complicated if you are switching to a stock 340i

[mat9]

Depends on which bumper you have, with the m-sport is just a matter of swapping the diffuser with the base it needs to be cut…

[rohan430i]

Is there anyone in the DC area (not a shop) who can help me do this conversion in their own garage? PM me please!