Honestly, that one had me
Honestly, that one had me wondering the same question too with the reasoning you gave. However, I am not familiar with this engine, but I could buy that there might be some emissions rerouting that would make this possible---there have been a lot of strange emissions setups over the years that are hard to understand the why's of. The host could have mis-spoke too; and or, may have been thinking about cases where the cat converter disintegrates, clogs up the exhaust resulting in high engine temp, valve burning, blown head gasket, etc. followed by engine damage secondary to the cat converter breakdown. Good question. Anyone out there have an answer regarding this engine type?