I was at the dealership the other day, and they had this modified f150 and I was looking at the exhaust and the tips were interesting. I have a maggie cat back, but these tips seemed to have like an insert inside them. i dont know how to describe them so if someone whose seen something similar can help out. the inside of the tip started out smaller from deaper in the tip and then spread out when it exited, it was a smooth exit however unlike the look from the maggie tip. anyone know what kind of tips these are?