blair id say get pics of them and post them.
from what i remember there injectors are side feed but there a completley different shape and will not work on a sr20 rail.
if there low inpedence no biggie you can use resistors fo that
i am not 100% sure but pics would help.
quote from another forum he says a different year supra but i am not sure if there the same......
MKIV 550cc Injectors in SR20DET
"Nope, they won't fit. If you can find someone who says they fit, then ask them how to do it. I looked at a set of them for some time and just decided they were not gonna work. The proportions of the supra injector are all wrong for the stock SR rail.
However, the 850cc secondaries from the RX7 FD fit the stock rail if you get the aluminum spacers that SARD sells for about $90. The proper spacing, swap on the stock o-rings, and use the FD connectors, then they work great. I am using these injectors as well as two other people on here (shirogomi180sx and Kaitain) SARD sells them as aftermarket injectors for the SR, but you can do it cheaper if you can get your hands on the stock FD secondaries.
Oh, by the way, the FD only has two 850's in it, and two 550's that won't work in our rails. You need the secondaries out of two FD's