the Pfc boost control for the WRX isn't an add on, it's built in.
For NISSAN pfc's you need the add on kit.

No Offence taken......I've run Profec's & Profec B's in my previous cars, the power fc holds boost just as well imho.

Sean told me anything up to 35 is safe for knock on the pfc. my (i tune my car myself) current tune is 1.65 bar, knock maxing at 15 at peak torque, afr's of 11.6.

If it has made 300hp what has changed?
What turbo was on it before?
How much boost was it running?

here's my 241 graph:

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