Something DIFFERENT rather than typical round tip
Adding OEM M5 exhaust from headers back was rather unspectacular until the TRUNK where extensive modification was needed to the passenger side trunk area to allow for the tail pipe to pass thru (540i has capability of driver's left side exhaust ONLY). M5 mufflers NOT USED (just the big OEM Silencer 2in2out) AND REPLACED WITH 3" TAIL PIPE INTO 3" FM Oval Angle-Cut Exhaust tips. A CUT ABOVE THE USUAL AND EYE CATCHING!!!!!!!!!!