AMRRACING-MONSTER COIL & REV Box COMBO Upgrade -Honda XR400 -(1996-2004) Stage 3-COMBO Increased Rev Limit!,Increased Horsepower! Work with or without Digital Dash features,With a Hotter Spark! Improved Throttle Response Easier Starting -Monster Coil Holes are 3-1/8" Apart Most Aggressive Timing Curve available! Eliminates stock ignition "cut out" Easy Plug & Play application, NON-Programmable, installs in minutes