CYLINDER HEAD 8971865890 8971865896 suitable for NPR models, equipped with 4HG1 4HF1 engines

Product Design Philosophy

Cast iron cylinder head for 4HG1/4HF1 engines. Precision-machined combustion chambers, valve seats, and ports ensure optimal airflow, reliable sealing, and efficient heat dissipation in NPR trucks.

How it works

Bolted onto the engine block, it forms the top of the combustion chamber. It houses valves, injectors, and intake/exhaust ports, sealing combustion pressure while managing airflow and coolant circulation.

Problems the product can solve

Fixes cracked heads, warped decks, valve seat damage, and coolant leaks from failed cylinder heads. Restores compression, combustion efficiency, and engine reliability in NPR trucks.