Engine: Perkins Diesel. Fuel Filter - H: 72| O/D: 89| I/D: 19. Spin-On Oil Filter - H: 91| O/D: 76| Thread: 3/4 in -16 UNF. Outer Air Filter - H: 310| O/D: 128| I/D: 83/BLANK. Inner Air Filter - H: 303| O/D: 83/80| I/D: 64/BLANK.
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