THIS REPLACES ALL THE OLD POINT TYPE IGNITION COILS ON KOHLER ENGINES AND THOUSANDS OF OTHER ENGINES IT HAS A INTERNALL RESISTOR THIS IS A VERY HIGH OUTPUT COIL OVER 30,000 VOLTS THAT IS WHY WE PUT A VERY HEAVY DUTY CONDENSOR WITH IT.WE ASK OUR COIL CO. FOR A HIGH OUTPUT COIL THEY SAID THEY COULD USE A INTERNAL RESISTOR WITH LESS RESISTANCE SO YOU GET MORE OUTPUT THIS WORKS ON ANY ENGINE 1 2 4 CYL. THAT USES A SINGLE OUTPUT COIL. THANKS GARY