British drivers shared the success across the GP2 races at Spa-Francorchamps.
Sam Bird claimed his fourth win of the year for Russian Time during the feature race while James Calado ended his win drought by controlling the sprint race.
Bird utterly dominated the feature race from pole position, finishing seven seconds clear of Marcus Ericsson.
Alexander Rossi hounded Ericsson for second place but ultimately settled for the third step of the podium, his second rostrum finish of 2013.
Fabio Leimer was fourth, with Tom Dillmann in fifth.
The race was neutralised following a heavy crash for MP Motorsport's Daniel De Jong.
De Jong made contact with Rio Haryanto at Eau Rouge and speared into the barriers at high speed. He was unhurt.
Felipe Nasr also endured a dismal afternoon as he hit team-mate Jolyon Palmer at La Source and had to retire.
Calado started the sprint race from pole position after finishing in eighth place during the feature race. Calado had been a podium contender during the longer event but lost several positions courtesy of a slow pit stop.
Calado and ART's first win of the season came during the sprint race as he bolted into a three second lead which he never relinquished.
Julian Leal closed down Calado, but ultimately came up short by four tenths of a second. Adrian Quaife-Hobbs finished in third place for Hilmer Motorsport.
Championship leader Stefano Coletti failed to score again but maintains his slender six point advantage after a difficult weekend for Nasr. Leimer is now just a point behind Nasr, while Bird and Calado are also now within striking distance of Coletti.