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Honestly the BRZ/FRS/GT86 FA20 has been the most bulletproof NA motor we have had the pleasure of working with. We've not yet seen a single one fail directly as a result of FI out of HUNDREDS. Keep it under 250-300 tq and have at it. Tune certainly has a lot to do with that, though the knock control is so good that even half assed ones have survived a good while.
If you want the most OEM like setup that's affordable, go for AVO or Greddy with a turbo, or pick any one of the SC kits. If you want big power then JDL and any of the US based manufacturers will get you there.
But anything up to about 12 psi will hold up just fine. Above that it likely will for a good while, but then it becomes a numbers game.
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