Andrew Aquilante passed Charles Espenlaub with 14 minutes remaining and led the final nine laps.
It was the first victory in the series for both Aquilante and Spaude.
The Sainteloc Racing squad ruled the roost in an eventful Friday Free Practice at Zolder as the French squad's two Audis traded places at the top of the time sheets throughout the day.
The No.14 Team Novadriver Audi R8 LMS of Portuguese pair Cesar Campanico and Ni Amorim will start this afternoon’s Race One from pole position after Campanico set the fastest lap time of 1:32.516 in Qualifying.
Giuseppe Ciro (ITA) and Gaetano Ardagna Perez (VEN) in the AF Corse Ferrari 458 Italia No.50 staged a stunning recovery to conquer Zolder’s wet-dry conditions and take victory in Race One at the second round of the FIA GT3 European Championship.