It wont matter. But the 565s are Sti pink injectors, and they are side feed, so you would need matching fuel rails to utilize them. I believe 05 or later Wrx injectors will be the size you are looking for and the right feed.
also, buy new o rings from Subaru regardless. Don't reuse old ones.
355 awhp fp green six speed wagon in Corvette Atomic Orange
I run DW (deaschwerks) in mine, in the 850cc variety due to the upgraded parts. They were highly recommended by my tuner when I modded my car about 4 years ago. Thats the only experience I have with aftermarket injectors.
I used modded stock injectors. They came out at 810CC's. They were all flowtested and within 4CC of each other which I thought was excellent. Never had a problem with them, they've been in there for a few years now.
I have a set of 565's sitting on my desk.... Two sets actually. From an 08 STI and 07 WRX (all the same after the 06+ WRX and 07+ STI). All you'll need is a new set of o-rings for them, which is pretty cheap.