Correction for ssj2.
Here's how the JP pipes works:
JP-1: gives you more torque; best for engine which lacks torque, or if you just want more torque.
JP-2: Gives you more topend. Best for engines such as the Axial, which have plenty of grunt, but lack top-speed.
JP-3: Boosts the midrange. If you have good acceleration, and good topend, but your midrange is flat, this pipe is for you.
It's not a best all-around pipe, but each pipe has its purpose.
Just clarifying for you Steven.
P.S.: I also recommend the Hitech 5955TG, and I hope ssj2 likes his revo.