After some wind tunnel testing this week, the sanctioning body chose to introduce an air deflector above right-side window, mandating it for all Cup cars 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 ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/nascar-cup-flip-airborne-crashes-michigan-daytona-shark-fin-lajoie/10647066/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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