[M4K04]

I recently started modifying my 2019 430xi and have wanted to get into the exhaust area. I am brand new to anything exhaust and was wondering if there was a large guide for my car specially or it is generally the same on any 4 series? Also if there are any recommended brands or videos/sound clips of different exhaust types. I am also going to tune my car soon, and was curious if it matters whether I tune it before or after changing the exhaust (or any other components for that matter).

Also will I need a different diffuser if it is a dual exit exhaust or will any normal one work?

[TX552]

YouTube is your friend.