I was rev'd up about the Vance & Hines exhaust until I saw a video dissection of one. The design of these is VERY complicated and restrictive, requiring the exhaust flow to double back on itself more than once in addition to flowing through a maze of chambers and little pipes inside the system.
I like these TorqLoops because they "look" like straight-through pipes... are they indeed just pipes? Other than the silencers, there's no restriction or weirdness inside right?