If Thursday's practice speeds are any indication, the qualifying record for the NASCAR XFINITY Series at Kentucky Speedway doesn't stand a chance Friday.

Eighteen drivers in Thursday's fourth and final practice before Alsco 300 qualifying posted laps faster than the record 181.287 mph lap that earned Carl Edwards a pole for the series' June 2005 race at the 1.5-mile track.

Joe Gibbs Racing drivers Erik Jones and Daniel Suarez recorded the top lap speeds over the last three practice sessions with teammate Kyle Busch also lurking near the top of the chart throughout the day. Busch is pulling triple duty this weekend, competing in the Camping World Truck Series, XFINITY and Sprint Cup races.

Austin Dillon of Richard Childress Racing was the only non-JGR driver to lead a session. He paced Thursday's opening practice with a lap of 187.754 mph in the No. 2 Chevrolet.

"It's nice getting into the XFINITY car and kind of learning a little bit before we get in the Cup car," said Dillon, a two-time race winner in XFINITY Series competition at Kentucky. "It's still very unique. The way the banking enters Turn 3, it's a flat corner. Then (Turns) 1 and 2 is very high-banked. You run wide open getting through 1 and 2. In three and four, you kind of have to back up your corner and figure out how to carry momentum and speed. It's still Kentucky. There's just not as many bumps and a lot of grip right now."

Jones, who last year finished second to Brad Keselowski in the Alsco 300, led the second (186.245 mph) practice and third in the No. 20 Toyota. His 187.800 mph lap in the third practice was the fastest of the day.

Series points leader Suarez, who earned his first career series victory last month, followed Jones in the second and third practices and led the fourth (186.845 mph). The driver of the No. 19 Toyota finished fourth in the XFINITY and Camping World Truck Series races last summer at Kentucky Speedway.

"Yeah, it definitely is different. But, it's fast and it's fun," said Suarez, who started from the pole in Thursday's Buckle Up In Your Truck 225 Truck Series race. "The race track used to have a lot of bumps and now it's brand new. We still have a few bumps here and there….There is some character still in this race track and I think as we run we are going to start moving around more.

He continued: "When we get into the race we are going to see a couple grooves out there. I think it's going to be interesting, but the most important thing is that it's fun and it's super fast."

Friday's qualifying for the Alsco 300 is scheduled at 4:45 p.m. with the race to follow at 8:30 p.m.