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.
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.
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).
Those drivers penalized due to inspection issues and the amount of practice time they lost due to the penalty were:
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
Three-time failures (30 minutes): Joey Gase