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96 impreza swap to 2.5

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i have many questions about doing this swap my main one is.... i have two 2.2 trannys one for a 97 legacy 5 speed and the other for a 96 impreza 5 speed will either of those work with a ej25???? also i will have to change my ecu correct???? any other helpfull advice would be nice as well

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all covered here in great depth. no ECU needed. either trans will bolt up just fine, motor doesn't give a rip what trans it's bolted to and most subaru transmissions are easily interchangeable.


as far as the trans go - the final drive ratio needs to match the rear diff of the car.

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