I Own vehicles with both and personally like the Flowmaster SOUND better but on a DAILY DRIVER I'd take the Magnaflow catback any day. There is ALWAYS a certain RPM where the Flowmasters with drone and if it happens to be at a speed that you drive at a lot it gets vary annoying. On my 70' Chevelle the Flowmaster 50's are great but that doesn't get driven every day and its hard to drive that car in the 55-65mph range for long distances due to the drone.