The two cars were in close contact throughout the penultimate lap, but the Patrón Highcroft pit erupted when Brabham cleared the Porsche.
"This feels incredible," said Sharp, who scored his first series victory after driving the opening stint, "These are the types of accomplishments the team is looking for this year. Anytime you can get one-up on Roger Penske's team, you've done something. We were well back Thursday and I can't say enough about the job the team did to get the car back."
As a result of the Highcroft success, Dumas and Timo Bernhard saw their eight-race class win streak end with their second-place finish. They finished ahead of Penske team-mates Patrick Long and Sascha Maassen.
Corvette Racing's Johnny O'Connell and Jan Magnussen scored their second GT1 victory of the season with a 1.374secs victory over the sister car of Olivier Beretta and Oliver Gavin. Magnussen began on the class pole position, and he and O'Connell never lost the advantage.
"The start was interesting, as it was a lot cooler than qualifying," said Magnussen, "The set-up was working perfectly - there were a few moments I got close to the wall, but I got some moments with Oliver where I could attack."
The duo also assumed the lead in the class championship, breaking a tie with their team-mates. Gavin and Beretta won nine times in class last year and have won the last three GT1 championships but, at least for the first three events, the playing field between the two Corvettes seem to have levelled.
"Things are really gelling well with Jan and myself," said O'Connell, "We weren't dominated last year, they were always close wins and we were always right there and just caught some bad luck. It was just the way racing goes, sometimes you have up years and sometimes they are down. Racing is a team sport, but any time we can beat the #4, it is a great thing."
