QuadBoss 2005 Polaris ATP 500 High-Performance CDIThese CDI Boxes are designed to unleash the power and enhance overall performance. Includes duplication circuits for maximum reliability, increased RPM redline and altered ignition advance curves to increase performance throughout the RPM range This Part Fits: Year Make Model Submodel 2005 Polaris ATP 500 Base 2005 2009 Polaris Ranger 2x4 500 Base 2004 2007 Polaris Ranger 4x4 500 Base 2004 2005 Polaris Ranger 6x6 500 Base 2004 2009 Polaris Scrambler