The car i got is a 2008 Subaru WRX. It came with the cheap EJ20 the last owner swapped in. I put in a lot of power mods and a STI 6-speed and now want to put in a real EJ25. A buddy of mine offered to trade his EJ25 out of is 05 base model automatic Legacy. If i was to put in his motor into this car and put back all the power mods and so fourth, would the new engine be fine with all the power and the 6 speed? Im just wondering if it would matter at all.