This is just a teaser video of our upcoming E-Tronic exhaust for the BMW E92 M3. It has wireless electronic valves that allow Race (valves open)and Street (valves closed)sound levels with no loss of power like other systems in the marketplace when the valves are closed. The car below has a full system from the header back with primary cat delete, 200 cell secondary cats and resonated X Pipe. More detailed write up including development pictures coming soon.