Justin Allgaier went from second-fastest in the first Xfinity Series practice Friday to fastest in the second and final practice later in the afternoon.
Allgaier covered the 2.5-mile Indianapolis Motor Speedway layout at 166.485 mph. Matt Tifft was second at 166.291 mph.
Teams are dealing with several changes for this weekend, including:
- Taller rear spoiler and splitter package
- Aero ducts on the lower front bumper area
- 7/8-inch restrictor plate
Saturday’s Lilly Diabetes 250 begins at 3:30 p.m. ET and will be televised on NBCSN.
Click here for the full practice grid.