Diesel engines do their hardest work in the toughest jobs, from highway semis to construction equipment, and the reason they ...

You might overlook the end gaps of piston rings in your car. They shouldn't be taken so lightly, though, as they actually ...

HOT ROD’s archives are chock-full of brilliant tech reports that truly are timeless. This one, drafted by Jim McFarland for our February 1972 issue, provides an extensive look at how important airflow ...

Many performance cars, including the supercharged Chevrolet Corvette Z06 and most Ferrari GT models, rely on forged pistons — instead of cast-aluminum pistons — for their additional strength. Forged ...