Alex Read was in sublime form, scoring on the stroke of half-time before playing in Lewis Perkins to double the lead.
Despite conceding a late goal, Harlow held firm to take an historic victory and set up an Essex derby away to Braintree Town in the 4th Qualifying Round.
You can read the full match report from Alan Scott on the Harlow Star website.
You can also read Ibrahima Sonko's exclusive interview with the Harlow Star here.