Motor mount aluminum plates, swash followers, main gear is a different slant and more teeth, obviously the pinion is different actually its the same as the new e5 pinion, SE has a tail gearing option. This is all I am aware of I'm sure there is more, I have not looked too hard. The motor mount plates incorporate the actual motor mount screws and the bottom bearing block to increase rigidity and also help cool the motor, also they look fricken awesome(I put some on mine).
