Kyle Larson issued penalty by NASCAR following Kansas

Kyle Larson with the old/new back window trick.

On Tuesday, Kyle Larson was assessed an L1 penalty from NASCAR for a rear window issue stemming from last weekend’s race at Kansas Speedway.

Larson’s No. 42 Chip Ganassi Racing Chevrolet was penalized because its rear window support braces did not keep the rear window glass rigid in all directions at all times and the rear window was not flush with the deck lid as the rulebook requires.

Crew chief Chad Johnston has been fined $50,000. Car chief David Bryant has been suspended from the next two Monster Energy NASCAR Cup Series points events (not including the All-Star Race).

The team has also been assessed with the loss of 20 driver points and 20 owner points.

Ganassi will not appeal the penalty and has not yet decided on a replacement car chief.

- Motorsport.com