This injection nozzle gasket is designed as an OEM-equivalent replacement for ISUZU NQR NPR-HD NPR 4HK1 5.2L 2004-2010. The gasket or seal set helps close the mating surfaces listed in the title and maintain proper sealing. Use during repair or reassembly when the original gasket is compressed, torn, or leaking. Compare the title fitment and original part details before ordering.