No one here mentions torque, just h.p... When I switched to the V&H CS-1, I noticed a small loss in the seat-of the-pants dyno below 3,000 rpm, but above 4,000 it wants to rip. Kawasaki did their best to match the stock pipe and fuel mapping for torque (including the flies). But, nothing can match the fabulous sound and grunt of that engine above 6,000 with the V&H CS-1 and that ****-eatin' grin that happens every time. I realize now in order to get all the low-end torque back I will have to get Guhl-ed. Maybe I will, maybe I won't. $375.00 seems a lot of loot for that.