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

(they are low impedance so you'd also need a resistor pack) maybe a better choice.

Alternatively Power Enterprise do various size injectors

(high impedance) that are a straight swap for the J-spec Supra injectors.

The GT35R is a good turbo choice
