Have you ever wondered how such a small, seemingly simple tool can lift an entire car? In this video, we’ll reveal the incredible power behind hydraulic jacks, the tool that makes lifting heavy ...

This is a great jack for lower cars, too, able to fit under your car just 3.5-inches off the ground. The jack has dual pistons to make each lifting stroke bring the car up higher.

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Illustrating that point, Car Craft performed a test to compare three cams: a flat-tappet hydraulic, a hydraulic roller, and a mechanical roller cam ("Three-Way Cam Lobe Shootout," Oct. '07, pg 28).