Yes, BOTH
And I agree with you, while I am shy of the 33x12.5 - This past weekend, we obviously wheeled our Jeeps. Being one of but a VERY few of 3.7L's with 285's or larger, I found that my performance made the 3.7L more capable of handling these tires while wheeling. Like It honestly felt no different than when I wheeled my 4.0HO with the 33X12.5's.