The 440cc J-spec Supra injectors are going to limit how much boost you can run, the 550cc injectors used on the UK/US/Euro spec Supra
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(they are low impedance so you'd also need a resistor pack) maybe a better choice.
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Alternatively Power Enterprise do various size injectors
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(high impedance) that are a straight swap for the J-spec Supra injectors.
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The GT35R is a good turbo choice
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