[mqrkzzz]

Hi, i want to see the inside of stock muffler for 330e,330i and I’ve been looking for an exhaust system for my 2020 330E (B48b20b) and i want to know which its the best type of muffler (Y type, chamber muffler, or straight) for stock car

And i’ve tried this muffler : it have a good sound but the result is very bad for me because i got a fuel consumption and i got bad acceleration in(1000-3000rpm)

now i got a resonator delete with stock muffler, bmc air filter