Injector plugs on my RB are different to the SARD (Nippon Denso) 550cc injectors I got and I need to get new plugs to fit - heres some pics. The part number on the injector when googled comes up as rx7 primary injectors if thats any help.
Old Injector and plug
New Injector - I need new plugs X 6 for rb20 to fit these injectors