Justin Haley fastest in final Xfinity practice in Las Vegas

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Justin Haley led a 1-2 sweep by Kaulig Racing of the top spots in Friday’s final Xfinity practice session at Las Vegas Motor Speedway.

Haley posted a top speed of 180.307 mph around the 1.5-mile track. He was followed by Austin Dillon, who posted a speed of 178.194 mph in the No. 10 Chevrolet.

The top five was completed by Kyle Busch (177.977 mph), Christopher Bell (177.930) and Tyler Reddick (177.778).

Busch, who had the best 10-lap average at 176.792 mph, scrapped the outside wall in Turn 2 early in the 50-minute session but won’t have to go to a backup car.

Click here for the practice report.

First practice

In a session that was heavily impacted by 23 cars incurring pre-practice inspection penalties, Justin Allgaier was fastest in Friday’s first of two NASCAR Xfinity Series practices at Las Vegas Motor Speedway.

Allgaier covered the 1.5-mile track at a speed of 178.737 mph and was followed by Busch (178.642 mph), Reddick (178.642), Haley (178.625) and Cole Custer (178.536).

Sixth through 10th were Dillon (178.394), Bell (177.819), Austin Cindric (177.427), Noah Gragson (177.282) and Zane Smith (177.264 mph), who is making his Xfinity Series debut this weekend.

Those drivers penalized due to inspection issues and the amount of practice time they lost due to the penalty were:

Late to inspection (15 minutes): Jeremy Clements, Cole Custer, Mike Harmon, John Jackson

Two-time failures (15 minutes): Jeff Green, Garrett Smithley, Justin Haley, Tyler Reddick, Brandon Jones, John Hunter Nemechek, Christopher Bell, Stephen Leicht, Chase Briscoe, Josh Williams, Vinnie Miller, Kyle Busch, Matt Mills, Timmy Hill

Late to inspection and two-time failures (30 minutes): Ryan Sieg, BJ McLeod, Ja Junior Avila, Cody Ware

Three-time failures (30 minutes): Joey Gase

Click here for the full practice speed list.

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