when trying to make "just upgrade components" comparison, I always like to look at F1 where money really isn't the object.
So, you have these 1400lb cars, that do 0-60 in 2.6 seconds, and relevant to the discussion, can stop from 100 mph in 131 feet. For reference, the 911 takes 305 feet. While there may be diminishing returns on tire friction vs weight (not sure), any aerodynamic drag only benefits braking at lighter weights.
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