Right now im running a off road x pipe with flowmaster. Flowmasters are restricted mufflers right? So then that gives me some back pressure since i have no cats right?? Well im soon going to put on a bassani cat-back wich are not restricted mufflers right??? So is that going to hurt me by not having any back pressure or will i still have some or will it feel the same? Do you reccomend i get a high flow x? I know when i put the o/r x on i felt a loss of torque so am i going to feel a even more loss with my new catback?