A circular cylindrical elongate check is provided having a guide portion disposed at a first check end within a guide wall defining the injector bore, a tip portion disposed at a second check end within {HEAD ~ a tip wall} defining {TAIL ~ the injector bore} and a sealing portion between the guide portion and the tip portion and disposed adjacent a valve seat defining the injector bore 
defining
A circular cylindrical elongate check is provided having a guide portion disposed at a first check end within a guide wall defining the injector bore , a tip portion disposed at a second check end within { HEAD ~ a tip wall } defining { TAIL ~ the injector bore } and a sealing portion between the guide portion and the tip portion and disposed adjacent a valve seat defining the injector bore
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