Slam the door on the competition with this awesome kit for the Polaris 800 Pro. We took our highly sought after Stage 4 kit and refined it for our competition hillclimb racers by adding a Bully Dog GT with custom SLP map, ceramic coating on the inside of the y-pipe and head domes and competition hillclimb style clutching. This combination provides a quicker revving, more responsive “racing” feel with an extra 100 RPM on top and another 2 lengths in acceleration. It remains compatible with 91 octane pump gas and truly provides Over the Top Performance.