That's a very strange dyno chart: http://sprintexusa.com/wp-content/up...astar_Dyno.pdf
It only goes up to 4460 rpm, and shows the stock engine making peak torque of 243 ft-lbs at 1650 rpm.
I bet that dyno chart is showing calculated brake torque/power (at the engine) based on some assumptions, rather than measured torque/power at the wheels.
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