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I have a 99 impreza wagon and was wondering what turbo i could use on it, WRX or sti???

 

if so what year and which is better to use?

 

also could i use an cat back from any different year/models

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It is not as simple as bolting on a turbo. Motors with turbos were engineered from the drawing board to be turbos, so many internal parts are extra heavy duty to take the extra stress of high pressures.

 

To have a turbo, you need to install a turbo. See if you can find one at a wrecking yard at a good price.

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From what I understand, an EJ22 has an open deck and an EJ22T has a closed deck. The walls around the cylinders are much thicker on the 22T to handle the extra compression. You can put a turbo on a regular EJ22, but if you boost it too much you are going to go through head gaskets pretty quickly or worse. Also, the turbo has a completely different ECU, so you would have to swap a lot of wiring to make it work. Seems like a lot of work for just a few psi to me. Now if you find an EJ22T in good condition with the ECU etc and don't mind doing the whole swap, you should be good to go.

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