Click to expand Tap to zoom DIESEL TESTER ADAPTER FOR 5.9L for Cummins by OEM Sale $87.99 SKU MI-SGT35600 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart For testing at fuel injector port. Applications include: 5.9L 24 Valve electronic injection and 5.9L ISB, ISBE, ISC & QSB diesel engines.