Why has the Ford 9-inch axle become the go-to axle for Ultra4 racing and hardcore use? It has a lot to do with the evolution of the axle assembly from the factory-built unit, to custom-fabricated axle ...

Performance cars have limited-slip differentials, period. The "One Wheel Peel Deal" isn't any more acceptable than running 17s in the quarter-mile. Unfortunately, it seems the only way to get both ...

Drag racing is a brutal sport. Launching a car on a sticky track is hard on drivetrains and losing is hard on egos. If something breaks, not only does it hurt your wallet—it means you’re loading up ...