I was originally going to get a Bassani Off Road X pipe this spring but I heard from a coworker that off road pipes don't make as much horsepower as catted. I was wondering if this is true. I thought no cats made more power. He says off road pipes don't have enough backpressure which makes you lose power. He has an F-250 with a catted dual exhaust. He says that it makes more power with cats. Never heard of this before. Is it BS? I did a search and all I found was no cats make more power.