With over $100,000 spent on its restoration, this street-scorching 1969 Hurst/Olds convertible features a 455ci big-block engine, a Hurst Dual/Gate floor shifter, power brakes and ...

For example, a new air dam below the 2014 Sierra's front bumper successfully reduces drag because it directs air toward the ground and away from the truck's rough underbody. And Sierra's ducted ...