Matt Kenseth’s race-winning Toyota Camry failed post-race inspection after the STP 400 at Kansas Speedway. The car was taken to NASCAR’s Research and Development Center for further inspection. The No. 20 Joe Gibbs Racing Toyota failed that inspection.
The engine of the No. 20 contained a connecting rod that did not meet NASCAR’s weight minimum. Toyota Racing Development provides engines for JGR.
It is standard procedure to take the race-winning engine to the R&D center for a thorough inspection.
NASCAR is currently mulling penalties for the No. 20 team.