To make this recycled pipe fit the 750SXi, Factory Pipe merely revised the cylinder mounting bracket to hold the choke and throttle cable, redesigned the stinger for more motor mount clearance, and updated the new pipe's tuning specs. Yes, The SXi pipe is also tunable like the 750SX pipe before it and that is perhaps the part's greatest feature. To tune this pipe, the user injects water into different sections of the pipe to change the exhaust gas temperature, and as such the performance. Your craft's exhaust system does much more than simply dispel burned gas from the engine. It also controls the engines power.
Sound waves move back and forth through the exhaust system.
When the cylinders' exhaust ports open, a sound wave carries burned gas from the engine. Just before the exhaust ports close, a sound wave comes back from the tail cone of the pipe, helping the fresh gas mix stay in the cylinder. A problem arises because when the rpm changes, the port timing changes. Some pipe manufacturers will have you correct this problem by changing the length of the pipe to set the exact exhaust timing you desire for a certain rpm. You change the length by cutting the pipe at either the head or the tail cone, as advised by the pipe builder.