Upgrading Fuel Injectors WRX 440cc ?

Hey folks I may be interested in upgrading my Fuel Injectors to the WRX 440cc Injectors, My 03.5 is running super lean I am not sure what is causing it, I did replace my plugs, wires, and coils, that increased performance a lot, but still running lean...this is why I may be swapping out injectors to those or stock onesnot sure

I do have a Unichip Plug and Play kit, its hooked up, not really sure how to use it properly, its $950 on ProtegeGarage and all I see is 3 switches in my car that I believe does't do anything LOL.
3 SWITCHES ARE: ECU Switch ON, MAP A/B ON, and Boost Control OFF.
Will this help manage the 440 Injectors?

http://www.protegegarage.com/202-product-202.html
http://www.unichip.us/system/upload...tions/1320011.0 Installation Instructions.pdf
 
Why do you need larger injectors? If your car is stock you do not need them and they will make it much more difficult to tune the car. The car runs lean because the Unichip needs to be tuned, most likely.
 
You guys are right I don't need the injectors, the I had a huge vac leak I fixed that up and 03.5 works flawlessly no fuel cut lol !
 
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