No I know the stock fpr is fine. We've discussed this before with alot of people, I have a forever too much fuel CEL that goes on and off for days at a time, so 1 of those parts I gotta replace has to be the problem.
BTW, I forgot to mention in this thread that I am running the WRX 565cc (dark blue) inectors, and I couldn't be happier. No more ignition pop (with 20 PSI spike) when I turn the key on!!! The car also runs smoother.
He had some low impedance something or anothers. They would cause a nasty ignition pop when you turned the key to start the car. Hes running 565's now.
The 440cc are going to leave you short. Wouldn't consider them.
The 565cc will be just enough for 300hp, but you won't have too much more over that. They'd be a great match for 300hp, though...so if you don't have any plans for going beyond that later on, do it.
You might consider a 650-750cc size if you think you might get "bored" of 300hp.