Originally Posted by UltimateBMW
Any idea why they didn't go with the full blown LS9 setup? Seems to me if they wanted the true track sedan, the oil sump changes would of been quite beneficial.
Because they don't want to sell the same motor from a $100k sports car in a $60k sedan. They detuned it a bit so the ZR1 still has that "something special" that justifies the major price differential.