HI ALL, IM FAIRLY NEW TO THE GTI SCENE AND I AM PROBABLY GOING TO SOUND LIKE A PLANK, CAN SOMEBODY PLEASE EXPLAIN TO ME WHAT THE DIFFERANCE IS BETWEEN A DIGIFANT AND NON DIGIFANT ENGINE, AND ALSO HOW I CAN TELL WHAT MINE IS. tHE CAR IS A MK2 8V GTI 1991.