Star Products TU-15-33 Diesel Compression Test Adapter Detroit Diesel 50 & 60Use with Diesel Compression Tester TU-15.Fits the injector well in the head and is held down with the injector's hold-down bracket.For Detroit Diesel series 50 & 60 engines used in medium and heavy-duty over the road trucks, off-highway trucks and vehicles, marine applications and industrial power generation.