Earlier today we watched as Patrick Long showed us how technique and driving skill can overcome huge horsepower deficits. Now, we get to watch as Leh Keen puts on a passing clinic in this 1977 Porsche 934.5. Out of the gates you can see that Leh has a power advantage over some of the others on the track. However, after a clutch problem sidelines him for a bit, we get to see him come back on track and pass everyone again, for a second time, as if nothing ever happened. It's amazing what these historic Porsche race cars can do in the hands of a skilled professional like Leh.