Kyle Larson is the newest driver in the NASCAR Cup Series to receive a significant L1 penalty on Kansas KC Masterpiece 400 on Saturday.
NASCAR announced on Tuesday that it was found in the teardown of the # 42 car that the rear window was not flush with the rear deck lid and the rear window mounts were not holding the rear window glass rigid in all directions
It is believed that an inappropriate rear window with an ominous shape creates an aerodynamic competitive advantage.
Larson led 101 laps of the night and was in position for his first Cup Series victory on a 1.5-mile track, but was involved in a dust test with Ryan Blaney 20 laps to go. The contact led to a dented left rear end and Larson told Fox Sports that after the race, the rear window malfunction was caused by the incident.
̵1; FOX: NASCAR (@ NASCARONFOX) May 13, 2018
Larson finished fourth, but as a result of the punishment, Larson's crew chief Chad Johnston became involved A $ 50,000 fine has been taken and car boss David Bryant was suspended from the next two-point-paying race. The team was also docked 20 points from the driver and car owner table and Larson will lose a playoff point earned with his stage win in Kansas.
Ganassi will not appeal. Team: "Although all parties agree that the infringement was unintentional and the result of the contact, we will not contest the penalty to focus our energy on the All-Star race and the Coca-Cola 600." All-Star, out for 600 / Pocono)
– Bob Pockrass (@bobpockrass) May 15, 2018
Rear window penalties are nothing new for NASCAR this season. In March, Kevin Harvick, the team of Stewart-Haas Racing No. 4, was rewarded with an L1 penalty for two offenses attributable to a rear window disturbance in Harvick's Las Vegas racing car.
Chase Elliott and Clint Bowyer also received all penalties after the race this year because of a lack of rigidity in the rear window area.
"The industry has seen something like a rash with the rear windows lately," said NASCAR.com Vice President NASCAR Scott Miller, Scott Miller. "The teams obviously have some performance in this area, and they somehow push the line, not to say that anyone wants their stuff to look and become illegal, but obviously they've found performance, and so are they sometimes you push it over the edge.
"I think that's the case with this and the case with the others we've had here recently with the rear window injuries. It's nice more of the same. "