[Dimman]

Could it have something to do with the weight reduction, and then a power conversion using the Dynapack's acceleration mode?

So they add the exhaust, subtract the weight they removed from the model, run it in acceleration mode and compare the output based on stock acceleration? The stock figures of 180 hp and 155 lb-ft could be somewhat consistent with how the Dynapack converts the axle torque to a figure somewhere in-between crank and wheel hp.

So the numbers ***could*** be something like "If you take out x kg of weight it is the same as if the motor gained 30 lb-ft of torque."

Maybe.