hey guys, i'm in the process of installing the injectors, but i came across a question. my 450cc dsm injectors came with small black things at the bottom of the injector, almost like a miniature seal. i already bored out the lower injector seals and am about to put the injectors in, but do i put the injectors in with these small plastic pieces on the bottom?

 

FYI you dont have to bore out your OEM seals, just oil them up a little and slide them in there a little bit, then throw your fuel rail on, and slowly tighten the bolts back on