Check out this LOUD BMW M3 E90 in action! This BMW M3 E90 has a custom Maxflo exhaust, installed by Fabspeed Motorsport! And it sure sounds GOOD! The video includes the BMW M3 E90 doing some loud revs, accelerations and downshifts! We hope you enjoy the exhaust sound of this BMW M3 E90 just as much as we do!