I am not sure the history of this item. It looks to be made from an actual N65 nozzle injector. Diesel Injector Compression Adapter Fitting. For Compression Tester Gauge (not included).
3350 Injector & Cam Gear Retaining Tool Kit for Detroit Diesel 60 Series Engine
Valve Tool Set for Detroit Diesel 60 Series Engine,3350 Injector Height Gauge
Valve Tool Set for Detroit Diesel 60-Series Engine, 3350 Injector Height Gauge
for Detroit Diesel 60 Series Valve Tool Set, Injector Cam Gear Retaining Socket
Snap On M3526 Original GMC Detroit Diesel Compression Adapter Made in USA
