QuadBoss 02-04 Polaris ATV Pro 500 4x4 PPS 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 2003 Polaris Ranger 4x4 500 Base 1999,2003 Polaris Ranger 6x6 500 Base 2002 Polaris Scrambler 500 2x4 Base 2002 2003 Polaris Scrambler 500 4x4 Base 2003 2004 Polaris