Duramax is king of the mountain again

4x4ord wrote:
If the 440 hp rating of the Powerstroke is not SAE flywheel hp what else would it be?

I have no idea, they sure did not use SAE on the tow ratings except for the 450. That's why I am asking.

GM is very clear about SAE Flywheel horsepower. Seems they always did well with "less power".