The LS9 engine block was designed for the factory Corvette ZR1 using the 2.3L supercharger. This engine block is torque plate honed from the factory and includes steel main caps and 8 piston oil squirters.
Features:4.065" finished bore size
Torque Plate Hone Finish
1045 Steel Dowel Located 6-Bolt Cross-bolted Main Caps
Piston oil squirters
Strong and Lightweight Aluminum Alloy Casting
Provisions for the latest in Engine Control Management