Your not going to gain to much HP with some of the gimmicks that are out there telling you big gains unless you are planning on putting on a turbo, just make sure your engine is running at the right Rpm, not over reving, just make good use of the power you have, floats are alright but coils ride better, only thing I found that made a difference on my xtx Phazer was a helix I got from Schmidt Bros Motorsports, stock clutching is right on it seems in these Phazers so don't be mislead to thinking your going to make it better with a kit unless you need to for getting the engine in the right RPM range, the MTX runs lower gearing for deep snow, so if that's where you hang out all the time don't mess with it. hope this helps