Originally Posted by
Do-Over
I really can't believe I'm saying this but I think your confused Monty. I think the JP-1 and 3 are low end and 2 and 4 are mid to top pipes.
JP-1 is bottom
JP-2 is mid to top
JP-3 is bottom to top (kinda combining JP-1 and JP-2)
JP-4 is smooth bottom with more top end
straight off the website (i was just adding to yours, Do-Over)