Full set of 6 CAT 137-2500 injectors that came out of a very early C12 with about 850,000. I bought a head that came with injectors and I did not need my old head for a core. Took the injectors out of the old head and kept them in case I needed them. When I needed them I couldn't find them. I no longer have any trucks that use this injector. Call five seven oh - four oh seven - oh oh six eight. Texts and emails will not get a response.