Injection Pump Sleeve Gasket for Isuzu NPR-HD, NQR, NRR, FTR – Designed for 4HK1 5.2L and 6HK1 7.8L engine applications. OEM Original Quality – Genuine ISUZU component for proper sealing performance. Fuel System Sealing Component – Prevents leaks and maintains injection system pressure. Easy Direct Replacement – Installs as a single gasket with proper fitment. Engine & Fuel System Part – Critical for injection pump sealing and system reliability. The Gasket Sleeve Injection Pump (Part 330-3011) is a genuine OEM sealing component designed for Isuzu NPR-HD, NQR, NRR, and FTR trucks equipped with 4HK1 5.2L and 6HK1 7.8L engines. Manufactured by ISUZU and listed as Brand Quality: Original, this component is used in the fuel injection system to provide a proper seal around the injection pump sleeve, preventing leaks and maintaining correct fuel system pressure. This gasket sleeve is critical for maintaining system integrity by preventing contamination and ensuring proper sealing in high-pressure injection systems. Engineered as a direct replacement, this part is supplied as a single unit and ensures proper fitment for compatible Isuzu truck applications.