Description? Forged 4340 steel in a non-twist forging with multi-stage heat treatment Shot-peened, stress-relieved, and nitrided surface for superior durability Target bobweight guaranteed +/- 2%. Will internal balance without heavy metal Recommended for use up to 1500hp Make: Chevy Engine: SBC (350 Mains) Material: Forged 4340 Steel Stroke: 4.000" Stroke Balance: Internal Balance Rear Main Seal: 2-Piece Rear Main Seal Rod Journal Diameter: 2.100" Main Journal Diameter: 2.449" Min. Rod Length: 6.000"
