Alright know im doing this the wrong way but I currently have a Legacy TSR with a stock NA Ej20. I wanna swap in a twin turbo EJ20 and I wanna know if everything is gonna bolt in and if I need the new twin turbo EJ20 ECU and if it will plug straight into my car. I would buy GT, however, there are none that suit my needs and would rather swap in a new engine also will everything such as transmission and front diff need to be new and all that good stuff. Thnk u