Specifically designed for Isuzu NPR, NQR, and NRR models from 1998-2007 with 4HG1T 4.6L, 4HE1 4.8L, and 4HK1 5.2L engines. 4HG1T 4.6L 4HE1 4.8L 4HK1 5.2L 98-07. COMPATIBILITY: Designed for Isuzu NPR NQR NRR models with 4HG1T 4.6L, 4HE1 4.8L, and 4HK1 5.2L engines from 1998-2007.