Best horsepower gain per dollar for the 2010-11 Arctic Cat 800HO! This budget bolt-on performer kit includes Boyesen Rage Cages, Power Commander 5 & our High Flow Manifold. We custom program the PC5 with our safe, reliable map to get you the most horsepower we can. Our industry leading performance manifold adds great horsepower and torque, and we drastically increase airflow with the Boyesen Rage Cages. All said and done you experience a 11-12 horsepower gain with great mid range power and killer throttle response.. A Stage 2 clutch kit is also recommended with this kit, or at least 2-3 grams of primary weight added to your clutch. Show them whats up without spending the big bucks!!!