Phoenix is a critical track on the NASCAR calendar, playing host to the season finale where the final four drivers in the playoffs battle it out for the championship.<br>NASCAR will utilize a 670-horsepower package at all tracks with the exception of superspeedways and the newly reconfigured Atlanta Motor Speedway.&nbsp;<br>The 550hp aero package was scrapped after testing at Charlotte Motor ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/kyle-busch-spins-next-gen-test/7599974/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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