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Stock EJ25 injectors should be 280cc/min. The STi injectors are (I believe) over 500cc/min. I suspect that you'll need to add a fuel controller to tame those injectors. Also, the 97's are sidefeed where the STi are topfeed (iirc) so matching fuel rails will be needed as well.

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Unless you have added a turbo kit, there is no need to upgrade your injectors.

 

The only thing you could do to them is have them balanced & blue printed, which equals out the flow rate on each and improves spray pattern.

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