Figitt, insulate your window sills first for $5 bucks from AutoZone and you won't hear it loud anymore. The problem here is not the Magnaflow but the crossfire insulation that's why we have that wind noise problem. Insert the new insulation behind the original rubber..there's a space there just enough for the half inch thick insulation from AutoZone and you won't hear it loud anymore. Also, allow a break in period for at least 500 miles for the exhaust to settle down.