The heart of our build is this crank. According to Eagle, their ESP cast steel crankshafts have a higher ductility than OE units and feature .092-inch radii on all journals for added strength. They also can use OE-style bearings. Brian Taube, of Eagle Specialty Products, told us that this package is rated for 500 hp at 6,500 rpm. Eagle also treated the crank, rods, and piston tops with their new ESP Armor finishing process. The results are a more-durable surface, stronger parts, and the slick surface sheds oil better.