Is it possible for these to work with my setup? They do not plug directly into my hybrid racing fuel rail (k series)?

Should I send them back to yoparts and order the rc injectors for $120 more?

Edit: The side that plugs into the rail is to small and does not fit.

 

the injector side is too small and will fit in the rail but is loose? i believe k series inj are suppose to be 14mm.