Reviewed By Barry B (Mountain View, CA) Reviewed for a 2001 BMW Z3 —1/21/2015 8:06 PM
Flowmaster describes this "mild". This easily sets off car alarms with excruciating low frequency resonance when stepping on the gas at midrange RPMs.
Reviewed By Wyatt B (Bartow, FL) Reviewed for a 1997 BMW 5-Series —4/28/2014 8:31 PM
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!!!!!!!!!!