Overview
- Cup Series teams completed a one-day, multi-team test on Jan. 13 at North Wilkesboro to evaluate a 750-horsepower rules package.
- The package features a three-inch rear spoiler and fewer diffuser strakes and is slated for use on road courses and tracks under 1.5 miles.
- NASCAR extended running to 7 p.m. to gather data across cooler evening conditions and varied track temperatures.
- Drivers reported cautious, early impressions that added power may increase falloff over long runs, with fuller judgments awaiting summer conditions and race scenarios.
- Fans were admitted to the grandstands and offered single-day tickets for the July 19 Window World 450, which will be the track’s first Cup points race since 1996.