Only writing I can see is RIN-579 with 5911 on the next line. It could be RJN-579 or RTN-579 but it's hard to tell. The other injector has 3110 where 5911 is on the other injector.

They both measure @ 14.0-14.1 resistance and have Nippon-Denso style connectors. The injection side has pintle style caps installed and it's the same length as a Bosch style 160 lb/hr injector. I use to think these were the old school Venom 1600cc/min injector's but I can't even find them on Google anymore...

Anyone know? Thanks