Eagle “ESP” H-Beam Connecting rods are forged from 4340 steel and utilize 3/8” ARP2000 bolts with alignment sleeves for a perfect fit. All Eagle Connecting Rods are packaged in weight-matched sets (+/- 1g). Sizing is done i house, on the state of the art Sunnen Krossgrinding system. “ESP” connecting rods are the perfect choice for engines up to 900 HP.