Both drivers were struck from the results for wrongfully being able to use push-to-pass on restarts. The third Team Penske entry of Will Power received a 10-point penalty but was not stripped of his finish.
Arrow McLaren’s Pato O’Ward has been promoted to victory, with Power moved up to second and Andretti Global’s Colton Herta third.
An IndyCar statement said: “An extensive review of data from the race on the Streets of St. Petersburg revealed that Team Penske manipulated the overtake system so that the No. 2, 3 and 12 cars had the ability to use Push to Pass on starts and restarts.
“According to the IndyCar rulebook, use of overtake is not available during championship races until the car reaches the alternate start-finish line.
“It was determined that the No. 2 and the No. 3 gained a competitive advantage by using Push to Pass on restarts while the No. 12 did not.”
The violations became known during the warmup session for the Grand Prix of Long Beach last weekend. Penske violated the following rules:
Source: Autosport