At the rolling start, it was pole-sitter Basz who got the early jump and led defending Super Trofeo Europe champion Postiglione into the first corner.
Further back, racing veteran and Pro-Am driver Piero Necchi spun into retirement in the #55 Imperiale Racing Huracán. The Italian, who raced a variety of single-seater cars in the late 1970s and early 1980s was unable to get his car going again and was out on lap one.
The Pole’s lead though was wiped out after Josef Zaruba crashed his Micanek Motorsport Huracán approaching Curva della Quercia, bringing out the safety car.
Postiglione was the first of the front-runners to pit when the window opened, with Basz following a lap later. The order remained unchanged but the #44, now with Galbiati at the wheel, began closing in on team-mate Paziewski.
Just off the podium, Niels Lagrange and Anthony Lambert claimed fourth for Leipert Motorsport, while the Target Racing duo Davide Venditti and new team-mate Jonathan Cecotto finished fifth.
Pro-Am winners Shota Abkhazava and Harald Schlegelmilch claimed a superb sixth overall, one place ahead of Silverstone Race 1 victors Jack Bartholomew and Stuart Middleton (Bonaldi Motorsport).
Taking victory in the Am class was Raffaele Giannoni in the single-entry Automobile Tricolore Huracán. Giannoni battled hard with the #63 of Cedric Leimer – who later spun out at Turn 1 – and the Pro-Am of Luca Demarchi, eventually finishing a creditable eighth overall.
Gerhard van Der Horst took his first victory of the season in the Lamborghini Cup ahead of brothers François and Benoît Semoulin.