Originally Posted by pkim1079
Who wants a resonator on a 328i?! Let it roaR. Lol. It needs it badly.
Because certain RPMS or times, like on the highway, you can get sounds you do not want-such as droning.
Borla will make the right call.
My CC catback got away with one muffler and was not over the top. But it's a fine line.