K&N Air Charger Performance Air Intake System C.a.r.b. Polaris RZR 900 The K&N 57-1129 AirCharger Air Intake System offers a comprehensive upgrade from standard factory air filters and housing. This K&N Air Intake System paves the way for a significantly smoother and more direct air flow path, facilitating better inhalation of air by the engine compared to the factory settings. A higher volume of air equates to enhanced power and acceleration across the entire RPM range of the engine. This system incorporates high-performance K&N air filters and a fully enclosed heat shield, fitting seamlessly into the space of the prior air box. With the use of free-flowing aluminum intake tubes, the gathered air is guided directly to the throttle body of the engine, confirming a sure power boost. The extra-large, cone-shaped air filters require maintenance after 100,000 miles of usage, under normal driving conditions. The air intake system uses existing factory mount points for installation and adds a silicone idle bypass hose replacement. The K&N 57-1129 AirCharger Air Intake System complies with the norms of all 50 states and is Carb (California Air Resources Board) certified with EO Number: D-269-78. Features: High flow intake filter and housing system Conical K&N air filters Free-flowing aluminum intake tubes Added power and performance across entire RPM range Enclosed design shields heat Smoother, less turbulent intake air pathways Washable, reusable K&N filter elements 50 state legal Carb approved EO Number: D-269-78