2021 BMW M340I B58 3.0 TU engine with 48v hybrid assist motor catless DP full 3" awe track exhaust no mufflers no resonators just straight pipes from the turbo to the big merge collector to dual pipes and quad tips in the rear nothing but pure sound !! yes it burbles yes it pops yes it crackles yes it has a check engine light until the DME IS UNLOCKED and it will be tuned. This is a cold start and then a few min later when warm