subaru101

any advice on how to go about doing this? i know that the block is the same. but im wondering about the gear ratios. or anything else that may need to be changed.any help would be appreciated.

have you looked at the O2 Sensors?are they wideband? if so, my 2001 OBW with the EJ25 had the same issue,would run, but after time it was barley driveable,i would suggest checking what kind of voltage ur O2 Sensors are putting out,it should be near 4 volts.

could be the heat shields directly under the drivers area, i had the same problem, and wen i removed mine,the noise went away, could be worth a shot.