I just purchased a set of blue top injectors off a 1990 Plymoth Lasor and as far as i knew they were dsm injectors? they say B450 on them? anyways it doesnt look like they will fit into my manifold holes. is there something i have to modify or am i just out of look? here a pic to better explain.

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U have to drill out the inner holes in the rubber bung that's placed between the injector and the manifold, if u search enuff you'll see a thread that covers this. can't remember the exact size u have to drill to but if u have a dial caliper handy i'm sure u can figure it out