5.0s are notorious for allowing gas odor into the car when running an off road midpipe. Is this something that the 4.6/Bullitts are known for as well? I am in the process of deciding which midpipe to go with and was strongly considering an off road pipe, like the Pypes X or a prochamber. But, I definitely don't want the same gas fume problem I had with my notchback. Are you o/r midpipe guys experiencing any gas fumes in the cabin? Thanks.