Hennessey likes to quote crank HP numbers, not WHP. But 13.0 is still pretty impressive for a tune, intake and exhaust. Direct injection and turbos FTW.
More info here:
http://jalopnik.com/5482405/hennessey-maxboost-435-lincoln-mks-first-drive
http://www.youtube.com/watch?v=ULdZ33-ShhA
More info here:
http://jalopnik.com/5482405/hennessey-maxboost-435-lincoln-mks-first-drive
http://www.youtube.com/watch?v=ULdZ33-ShhA