i have regular magnaflow mufflers. i think the difference in them and the magnapack is that the magnapack is more of a glasspack type muffler. i havent heard anything about these on a v6. the h-pipe im getting is from mac because it matches up with their LT headers, but im pretty sure you could find them from anywhere. the mac pipe is kind of expensive at around $370.00, but they have an offroad version that is cheaper