Balanced 4.000" CAST CRANK, 6.200" I-BEAM RODS,3/8" ARP 8740 BOLTS,HYPEREUTECTIC KB -6.5CC FLAT TOP 4.030" PISTONS,PLASMA-MOLY FILE-FIT RINGS,KING SI ROD/MAIN BEARINGS, DAMPER & 157 TOOTH FLEXPLATE.