We explore the differences between single and split-duration camshafts. Can the extended exhaust duration of the split pattern crutch poor exhaust flow? Does the single pattern really suffer at RPM in the name of low-speed torque? And why would you ever not want to run a split pattern?

Some claim it makes more power, others say it helps an engine rev more quickly, but can the simple flopping of a piston's orientation in the cylinder really affect its performance or behavior? Today, the guys perform what may be the first ever back-to-back comparison of factory-oriented pistons against reverse-oriented ones.