Exhaust downpipes, stock (left) vs Akrapovič (right) for BMW E71 X6M #BMW | #E71 | #X6 | #X6M | #E71X6M | #Akrapovic | #exhaust | #downpipe | #bmwmotorsport | #mpower | #mcars | #mperformance | #bmwperformance | #bmwmperformance | #performance | #perform