Following some wind tunnel testing this week, NASCAR's sanctioning body chose to introduce and mandate an air deflector above the right-side window for all Cup cars running this weekend at Daytona. It matches an existing 'shark fin' on the left-side of the car, designed to make the liftoff speed higher. In essence, cars will have to be going faster to reach a point where blow-over crashes become possible.
Last weekend, Corey LaJoie spun on his own flipped down the backstretch at Michigan. The wreck was the first blow-over incident at non-superspeedway track in the Cup Series since 2010, when Brad Keselowski flipped upside down at the old version of Atlanta Motor Speedway.
