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Cook also has a lightening program for the gears, as you can see on the left. When done to the two main gears, he says this cuts about 1.25 pounds of rotating weight without reducing strength. Cook doesn't recommend this for rookie drivers or back-of-the-pack teams, saying that there are better ways of spending your money. But for race teams competing for wins and championships, this, along with his gear-polishing program, can improve the transmission's efficiency and, in turn, improve lap times.