AMRRACING-CDI-REV Box Upgrade -Yamaha-ATV-RAPTOR 660-2002-2005 Stage 3 Increased Rev Limit!,Increased Horsepower! Work with or without Digital Dash features,With a Hotter Spark! Improved Throttle Response Easier Starting Most Aggressive Timing Curve available! Eliminates stock ignition "cut out" Easy Plug & Play application, NON-Programmable, installs in minutes