UPDATE: “After further review of the inspection process throughout this weekend’s events at Las Vegas Motor Speedway, NASCAR has rescinded the No. 12 disqualification penalty.
Monday morning during its race weekend debrief, NASCAR discovered an issue with the damper template used for inspection.
NASCAR then conducted a detailed investigation, and has restored the No. 12’s stage and race finishing positions from Sunday.
NASCAR has taken internal steps to remedy this issue moving forward.”
— NASCAR —
Team Penske Statement: “We are pleased with the decision by NASCAR to rescind the post-race disqualification to the No. 12 car following Sunday’s race at Las Vegas Motor Speedway. NASCAR has shown a tremendous amount of integrity throughout the process which has led to this conclusion. We are proud of the effort and the results by the No. 12 team during the 2023 season. We look forward to continuing the pursuit of the NASCAR Cup Series Championship.”
AND: Cup Series Managing Director Brad Moran discussed the penalty Monday evening on SiriusXM NASCAR.
“We realized that the dampener plate at some point was not consistent throughout the entire weekend, which is obviously on us. We had to make it right.” pic.twitter.com/e2i0Bg9fj4
— SiriusXM NASCAR Radio (Ch. 90) (@SiriusXMNASCAR) October 16, 2023
ORIGINAL POST 10-15-1023: Inspection is complete following the South Point 400 NASCAR Cup Series race at Las Vegas Motor Speedway on Sunday, October 15, 2023.
There were no issues for #5-Kyle Larson. He is officially the winner and locked into the Championship race.
#12-Ryan Blaney has been disqualified because the left-front shock didn’t meet the overall specified length outlined in NASCAR Rule Book number 22.214.171.124.
(Of note, as of 2022, after decades of not disqualifying drivers, NASCAR changed that and it is in the rules, see NASCAR.com for the rules)