: The K100 series debuted in the early 1960s. The "E" (E-series) was a later refinement that continued in North America until approximately 2002 , when declining demand for COEs led to its phase-out in favor of aerodynamic conventionals.
The K100-E was highly customizable, featuring a variety of powertrain configurations: KENWORTH K100-E 1,45 – 1,46
: Known for extreme longevity; some units have been documented with over 1.6 million miles on the original powertrain. : The K100 series debuted in the early 1960s