After suspending penalties during the month of May, the IndyCar Series has revealed that two drivers will get 10-spot grid penalties for having changed their engines for this Sunday's Chevrolet Detroit Belle Isle Grand Prix.
Graham Rahal (Ganassi), who had to change his engine on May 14th and required a replacement to use before installing the uprated single-turbo Honda V6 for Carb Day and the race, will face a 10-spot penalty in the No. 38 Service Central car.
The other driver sanctioned is Simona de Silvestro (HVM racing) who was forced to change engines on May 17th and will likely start last on the 25-car grid.
A third unidentified driver could also get a 10-spot grid penalty although the details remained to be officialised.