2018 NASCAR PrimeStar Series (Johnsonverse)

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The series logo for 2018.

The 2018 NASCAR PrimeStar Series was the 37th season of the NASCAR PrimeStar Series, a stock car racing series sanctioned by NASCAR in the United States. William Byron won the 2017 championship with JR Motorsports, but moved up to the NASCAR Panasonic Cup Series. Tyler Reddick drove the JR Motorsports entry left vacant by Byron full-time. Christopher Bell won the championship.

This was the final season in which PrimeStar sponsored the series, as in 2019, Anhauser-Busch, who had sponsored the series from 1984 to 2007, returned, and the series reverted to the name NASCAR Busch Grand National Series.