Ok, so what I can tell, this is what I have,
Nissan Tech Info. LOOK HERE FIRST! ca, sr, ka, rb, vq, vg, etc. - Page 3 (link should load up the right post) Deatschwerks 550cc re-drilled stock injectors. They look identical to this and have the same part number. Makes sense because I was told they were 550cc injectors.