The Competition series balanced rotating assembly is for the serious racer looking for quality and reliability at a reasonable cost. These kits start with a Wheeler 4340 forged crankshaft, Wheeler 4340 H-beam connecting rods and Keith Black forged pistons. Add in moly file fit rings and high performance race bearings and you have the foundation for a very potent engine. ARP 2000 rod bolts are available as an option.