Cylinder Head Intake And Exhaust Valve Stem Seal Compatible With : 1998-2004 Isuzu NPR L4, 4.8L / 4752 CID SOHC 16 Valve, Diessel, Turbo, Engine Code : 4HE1, Vin : 4,5 - Industrial L4, 4.8L / 4752 CID SOHC 16 Valve, Diesel, Turbo, Eng Code : 4HE1TC, Industrial L6, 7.1L / 7131 CID SOHC 24 Valve, Diesel, Turbo, Eng Code : 6HE1TC, 6HE1TCN