Proper injectors for stock Speed Density 5.0 August 02, 2020, 12:41:05 PM My car has been diagnosed as having a bad set of injectors, and it runs poorly. SOME of the injectors, at some pont in the cars life, have been replaced with ones that have a different housing. I look at the parts store/rockauto, and there are numerous part #'s and slight variations in injector styles. How am I to figure out what part # is correct for my motor? From what I understand, injectors are very specific and it is crucial to the vehicle's performance that they be matched to the computer.