Re: HFS-4 Q&A, application for your engine...
I am a bit behind with the subaru tunung tool.
What MAP sensor are you using on your car. The HFS-4 has 2 or 3 bar option. The V1.1 (release this May. SN ~121101 on) will have 2.5 or 3.5 bar option instead.
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Richard L
aquamist technical support
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