Intake grate, aftermarket pipe after market arrestor, different pitch impeller..... the list goes on. These parts will make some what of a difference, but I am sure what you will here from most members is that it is not really worth the money you will spend in parts for a few more MPH or out of the hole jump. Remember speed does come at a t cost. Enjoy the ski for its current capabilities which are already good and save up and get a new model that will be better than anything you could ever do in modifications:cheers: