Three-time world champion Jim Halsey qualified No. 1 in Switzer Dynamics Pro Nitrous at the two most recent Professional Drag Racers Association (PDRA) races, taking home the Structural Concrete Nitrous Wars nitrous bottle both times. Now a three-time low qualifier this season, Halsey tightened up the Nitrous Wars battle, which is now a tie between Halsey’s engine builder, Fulton Competition Engines, and Pat Musi Racing Engines.