So they aren't that good I hear. Hemi was better wasn't it? Cranking out 400+ or 500+ horsepower from a 3 liter six creates lots of heat. Who here has ever, ever heard of a 5.7 or 6.4 hemi overheating from a heavy load? Never. Hemis had 2 issues the exhaust manifold bolts and lifter failure if you idled it, for hours and hours. But you could put a beating on a hemi day in and day out. Not this Hurricane.