They weren't stock back in the 50's, much less the 60's. When Kevin Harvick passed Truex with 1 lap to go on Saturday night, no one broke down or hit the wall. It was just good racing. Kyle Larson put on quite a show - starting at the back and finishing 4th. Kyle might have won - except for an incident that damaged his car when Ryan Blaney and he made contact with about 20 laps to go. Larson led 101 laps - more than anyone else. So much for the "no passing" theory.