Non-interchangable parts ? What are you smoking... There are like 3 parts on the whole motor that you cannot get over here. Everything else is Sentra 2.0 or other Nissan parts readily available over here. Only stuff hard to come by : water pump harness and Bell Housing for tranny... but Ive never gotten a motor with these parts broken. Anything else that is a non-US part is very very easy to get....

later
martin s.
sr20det soon to be CA18DET