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Next year's base package includes a 3.5-inch spoiler (currently 6 inches), a 0.25-inch front leading splitter edge (currently 2 inches) and a 33-inch wide radiator pan (currently 38 inches; it was 28 inches at the Darlington and Kentucky races).
The result of the smaller spoiler and other components will produce less downforce -- downward thrust of a car created by aerodynamics -- which drivers say gives them more control of the car and also results in both less throttle time and slower speeds in the corners.
Low downforce prevalent in 2016 rules package | NASCAR.com

