277 hp and 460 lbs-ft (@1500 rpm) are the rumored “official” numbers (I can’t find it anywhere but one source.)

Behold the engine for those pining for the great mileage you used to get from the original duramax.

It’s going to need to be pretty danged impressive MPG wise compared to the real world mileage you get from the 5.3 tho compared to how much extra it’ going to cost; 3-4 grand.

Still, what I would do to get one of these with the 10 speed in my cruiser.  holy crap.