NASCAR Cup Series action continues at Las Vegas Motor Speedway on Sunday, but four teams have been hit with penalties ahead of the race, including Team Penske.

Each weekend, NASCAR technical inspections take place at every track, both pre-race and post-race, ensuring all cars are legal and within the rules.

Teams are allowed to fail once, make adjustments, and try again without punishment, but if a team fails tech twice, it is a mandatory penalty. The punishments get more severe as the failures rack up, but all teams must pass before they are allowed to compete.

Following inspection ahead of practice and qualifying in Nevada on Saturday, four teams have found themselves falling foul of the rules and will now pay a price for the remainder of the weekend.

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NASCAR confirms Las Vegas penalties

The four cars in question are Austin Cindric's No. 2 Team Penske Ford, William Byron's No. 24 Hendrick Motorsports Chevrolet, and the Nos. 10 and 16 Chevrolets at Kaulig Racing driven by Ty Dillon and AJ Allmendinger.

All teams have now each had a crew member ejected for the remainder of this weekend's event, but that isn't the only punishment NASCAR has sent their way.

On top of that, all four of the above drivers have lost their pit stall selections for Sunday's race, which will affect them and their positioning every time they come down pit road.

Byron was the highest qualifier of the four cars in ninth on Saturday, with Austin Cindric set to start Sunday's race in 31st.

The Kaulig duo of Allmendinger and Dillon will start 29th and 36th, respectively.

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What is NASCAR tech?

Every weekend, no matter the race, track, or event, NASCAR requires all Cup Series teams to pass inspection before hitting the circuit.

If a team fails tech on the first instance, it must fix the issue and repeat the process all over again until it passes.

If a car fails once, there is no punishment. However, if you fail twice or more, punishments are handed out, such as in the case of Garage 66 and the No. 66 car above.

According to NASCAR, the point of inspections is to level the sport's playing field as much as possible.

The website also outlines the five stations of a standard inspection, which are as follows:

Station 1: Car is elevated to visually inspect the nose, under the body and inside.

Stations 2-3: Body is visually inspected using a handheld template to ensure the body conforms to regulations.

Station 4: Optical scanning is used to inspect the chassis and body of car.

Station 5: Holding blocks are removed and final safety inspection is done.

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