Today, I address a viewers concern about Speedway's brand name cylinder heads having leaking valves out of the box. Let's put this pair to the test. It's a little long and boring. But, I hope it gets the point across. **SORRY, I REFERRED TO THEM AS SUMMIT HEADS. THEY ARE SPEEDWAY HEADS....... MY BAD.#Speedwaymotors #automobile #mechanic #racing #streetrods #cylinderheads #461doublehumps