FMF has revolutionized the 2-Stroke performance pipe with it's newest SST lineup, you will realize in most cases a 10-13% overall power gain as well as more usable torque, tractability and cooler running temperatures. This performance enhancement will most likely be the biggest performance gain that you can bolt on your machine. This is accomplished within the stinger section of the pipe , which takes the return wave and creates a stronger force via it's specially designed final convergence cone.