The 2nd Generation D100 debuted midway through 1965, now sporting two headlights instead of four. Three new engines were added as options including a 440 cubic inch big block during the 2nd Generation's production run. In 1968, a the D100 received a midlife facelift and new trim levels including the Adventurer and "The Dude" trims.

Creates a considerably hotter spark that lets the flame expand more rapidly in the combustion chamber and a more complete and efficient burn of the air/fuel mixture