Practice 2 recap | Results
Austin Dillon rolled right to the top of the NASCAR XFINITY Series leaderboard in Friday's second session in his No. 2 Chevrolet after putting the No. 3 Richard Childress Racing Sprint Cup car atop that series' first practice at Auto Club Speedway.
Dillon's top speed in the final session was 176.622 mph, compared with Kyle Busch's fastest lap of 177.327 mph to pace the opening session.
Busch put his No. 18 Joe Gibbs Racing Toyota pretty close to the top of the speed chart again, ranking second at 176.013 mph in the final practice session for the TreatMyClot.com 300 by Janssen (Saturday, 4 p.m. ET, FS1, MRN, SiriusXM NASCAR Radio.)
Ryan Blaney was third-fastest at 175.863 mph in his No. 22 Team Penske Ford, Ty Dillon's No. 3 Chevrolet was fourth (175.623 mph) and Kyle Larson ran fifth (175.588 mph) in the No. 42 Chevrolet.
Brandon Jones made contact with the wall in his RCR machine about halfway through the afternon XFINITY practice session at Fontana, causing some damage on the right side of the No. 33 car.
Practice 1 recap | Results
Kyle Busch continued his 2016 NASCAR XFINITY Series domination by topping the opening practice at Auto Club Speedway ahead of Saturday's TreatMyClot.com 300 by Janssen (Saturday, 4 p.m. ET, FS1, MRN, SiriusXM NASCAR Radio).
Busch paced the opening 85-minute session with a fast lap of 177.327 mph, which was just over 2.3 mph faster than the second-place lap of teammate Erik Jones (174.982 mph). Kyle Larson (174.910 mph), Elliott Sadler (174.795 mph) and Austin Dillon (174.681 mph) rounded out the top five.
Busch, Larson and Dillon will be pulling double duty this weekend, running in Saturday's XFINITY race and Sunday's NASCAR Sprint Cup Series Auto Club 400 (3:30 p.m. ET, FOX, MRN, SiriusXM NASCAR Radio).
For Busch, the top spot on the speed chart picks up right where he left off last weekend at Phoenix. The Joe Gibbs Racing driver has won the last three XFINITY Series races of the season and six of the last 10 held at Auto Club.
Points leader Daniel Suarez placed seventh in the session, while defending race winner Kevin Harvick was 11th.
Justin Allgaier, fresh off a fourth-place effort at Phoenix International Raceway, made contact with the wall a little over 20 minutes into practice. That damage led the JR Motorsports driver to go to a backup car.