Chevrolet GM Industrial Marine 5.7L 350 Vortec Cylinder Head Set of 2 906 / 062 Exhaust Manifold Part Number: 12721339

Part Number: 12721339

Key features include advanced fuel injection technology and a robust design optimized for durability under heavy workloads

It is compatible with LS coil part numbers 10457736 and 12611424

0L (VIN U 8th digit 8-364) ENVOY 05-09 5

3L VIN B (8th digit opt L33) SIERRA 1500 PICKUP 07 classic style (creased door skin) 5

Chevrolet GM Industrial Marine 5.7L 350 Vortec Cylinder Head Set of 2 906 / 062 Exhaust Manifold Part Number: 12721339The GM 10239906 Vortec Cylinder Head is specifically designed for 5. 7L small block Chevrolet engines. Cast from high quality iron it features 64cc combustion chambers and 170cc intake runners to enhance performance. The head includes OEM valve components such as intake valves and valve spring retainers ensuring durability and reliability. Known for its excellent airflow characteristics this head significantly improves engine efficiency and output