Injector identification help!!!

[BIRDCLAWTSi]

can someone please help me identify these injectors? the only numbers i could get off of them was 3102 on the side. i found injectors that i think they are, siemens deka 55's 575cc that flow like 550's. i had these in my car and i had to add like 30% on the low corrections. with a 2g maf. that seems way off. the last picture shows the 3102 that is stamped on the side of the body. the first picture shows a number 180A but all 4 have different numbers stamped on the back in that same place. they are 180A,168A,114A, AND 009A. and on the side the markings y991 are etched into them.

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[BIRDCLAWTSi]

wow, i guess i am not the only one who cant identify them.

 

[thatblondechik]

Best I can find, you're right. Siemens 575cc

Where'd you pick these up?

 

[BIRDCLAWTSi]

Best I can find, you're right. Siemens 575cc

Where'd you pick these up?

i picked them up from a guy in the classifieds in october, i had them in my car with a 2g maf and was having to add 30-35% fuel on the low throttle with an afc. i checked for boost leaks and vacuum leaks. everything checked out. i dont know why i would have to add so much fuel to compensate for them. on top of that i have a way bigger fuel pump than i thought i did, so they should have flowed pretty good. either way, i have replaced them with PTE 680's and my corrections are right on with them. it seem my engine runs a little on the lean side for whatever reason. but it seems like the "550's" ran less than stock. thanks for your input.