IMSA Officials have concluded their post-race review of the late-race collision from last weekend’s six-hour endurance round at Road America, issuing penalties to Porsche Penske Motorsport and driver Kevin Estre for their role in the incident with Jack Aitken in the #31 Whelen Cadillac.

Following a comprehensive review of the incident that took place during the Motul SportsCar Endurance Grand Prix on Sunday, Aug. 2, race officials penalized the #6 Porsche 963 and its driver under the 2026 IMSA Sporting Regulations:

• Post-Race Time Penalty: The No. 6 Porsche Penske Motorsport entry receives a time penalty equivalent to a five-minute stop-and-hold penalty for incident responsibility under Article 57.3.5.
• Driver Probation: Driver Kevin Estre has been placed on probation for two races for unjustifiable risk under Articles 30.2.4 and 57.3.3. IMSA explicitly noted that further penalties while on probation could lead to driver suspension. 

Late-Race Chaos at Turn 1

The controversy erupted during the closing minutes of the Endurance Cup round on the 4.048-mile, 14-turn circuit. With just over 10 minutes remaining, Estre in the #6 Porsche 963 and Aitken in the #31 Whelen Cadillac V-Series.R were locked in a fierce duel for second place behind race leader Filipe Albuquerque.

As the GTP field accelerated down the front straight toward Turn 1 on the race's final restart, the two frontrunners leaned into each other battling for positioning. The contact sent both high-profile machines sliding at speed into the outer barriers, instantly ending their days and triggering a race-ending full-course caution.

#6 Porsche Penske Motorsport Porsche 963: Laurens Vanthoor, Kevin Estre

Photo by: Brandon Badraoui / Lumen via Getty Images

Result and Championship Implications

The full-course yellow cleared the path for Albuquerque and co-driver Ricky Taylor in the #10 Wayne Taylor Racing Cadillac to cruise to victory under caution.

Estre and Aitken were classified in eighth and ninth place in the GTP class. The five-minute post-race time penalty further cements a costly outing for the #6 Porsche crew as the series enters the final stretch of the 2026 season.

Read Also:

• 

  IMSAPorsche Motorsport boss reaffirms program stability amid corporate realignment

• 

  IMSALaurin Heinrich secures dramatic runner-up at Road America despite 'exploding' door

We want your opinion!

- The Motorsport.com Team