BMW M3 VS M6 x Zperformance x Fi Exhaust - M&Ms power battle on track HD

Exhaust come with valve as standard including our intelligent ECU system which control valve by engine RPM or remote control. F80 M3 Video Fitted with FI Complete Exhaust System includes: Catback Valvetronic Muffler + Dual Tips Catless DownPipe. For more product information Please visit http://www.fi-exhaust.com/product/bmw/f82_m4.html M6 Video Fitted with FI Complete Exhaust System includes: Catback Valvetronic Muffler + Quad Tips Catless DownPipe. For more product information Please visit http://www.fi-exhaust.com/product/bmw/f13_m6.html Or email to us for inquiry: (info@fi-exhaust.com)(inquired@fi-exhaust.com)