Top Definition
One of Navistar's best diesel engines ever made, commonly found in International heavy duty trucks & Ford light duty trucks.
person 1: "My 7.3 IDI has over 400,00 miles on 'er and still runs strong as ever!!"

person2: "Ahh... that's good ol Navistar for ya :D"
by fourm128 December 28, 2009
5 Words related to 7.3 IDI

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