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The IMSA WeatherTech SportsCar Championship regular, who is leading this year's points with Action Express Racing, will drive one of the four factory M-Sport Bentley Continental GT3s entered for the Blancpain GT Series Endurance Cup blue riband round on July 27/28.
Bentley motorsport boss Brian Gush told Motorsport.com: "Pipo is a good endurance driver who we've been watching for a while.
"We tested him at Mugello last month and he was immediately quick, as we expected."
Derani, who previously contested the Spa 24 Hours aboard a Garage 59 McLaren in 2016, said: “I tested the Continental GT3 last month, and it’s unlike anything I’ve driven before, but I got to grips with it so quickly.
"I can’t wait to get back behind the wheel at the test next week [the official test days on July 2 and 3], and I’m looking forward to battling for the Spa 24 Hours win.”
Bentley has opted to split regular BGTS partnership of Soucek and Maxime Soulet for Spa.
"We wanted one driver in each crew who knows the car and how the team works, a team captain," explained Gush.
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