if its a straight swap do it...if the gtr is all good.youll have alot more fun in a car that dont have traction problems as the 33 may have with that power
not 2 sure now but i no i had to makeup a reducer out of the bungs in the 02 sensor holes as i must have got the 33,34 gtr ones cause the holes where to big and the old dumps reducer didnt fit.other than they fit sweet as