Totally agree with nauli. Realistically we don't really need to modify our cars, but when we do there's certain steps that need to be taken to properly and reliably modify a car. Instead of leaving the life of his engine upto the off chance he may get away with running the car untuned were better off passing on the information the professionals all tell us.
06 and on need to be tuned when modified.

a very good explanation and analyzing by nauli,monkee and astralex on how important when the car has been done all the modification

lol this is dumb...

Also fuel pump for GD Subarus only $115 from Car Mods.

Walbro GSS342 255lph fuel pump (GD Subaru) - Walbro

Don't be cheap and do things properly.

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hello my name is tommy
i don't have a Subaru

I know people who run pigs with no tune and a tbe, their engines haven't popped (yet) but I tell them to get a tune all the time.

Apart from that I am agreeing with what you say and was one of the first to tell the op to get a tune, I don't know how your interpreting my posts but I am not suggesting the op skips getting a tune...