RX7 injectors

[BHDave]

Every one knows about the SV high imp injectors, pink offset plug with part no 195500-2020 and S4 low imp injectors with centre plug, brown (i think), low imp and part no 195500-1370.

I have 4 odd ball, high imp, pink offset plug, denso 550 injectors with part number 195500-1370 (the same as the low imp injectors). These were taken out of my old rx7 and swapped for another set the same a while back (pure fluke i think) so i know they are 550s.

Anyone know if there is a difference in the plug between my injectors and the 550s with no -2020. I'm looking to make a set of six soon so i would like to know as i don't really want different plugs and impedences in some injectors.

Cheers

Dave