I have 650cc injectors sitting at home and am unsure whether to sell or install. I have had an bosch 044 installed and dont want to install the injectors with no gain(rembering standard are 440cc). I have a standard fpr and autronic ecu to run these at 18 psi. Do I really need these injectors?

Thanks again for your help

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Old Dog

If you already have them then you may as well install them. They are quite large for your application but it shouldn't too big that it cant be tuned properly.

At least with 650cc you will have plenty of headroom for any future mods down the line.

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RS Liberty - Because WRX's are only good for parts...

standard ones should be fine for up to 20psi, 650cc maybe to large

Whats your IDC % at? Has your tuner mentioned that the stock injectors is holding back power?