Any difference in the prop shaft diameter between 2013 and 2014 g23 550hp boats?

[wilhelmwake]

Is there a difference and also are there other differences between the model years, except the surf exhaust?

[nyryan2001]

Yes there is.

2013s had 1 1/8" shafts

2014s have the 1 1/4" shafts.

Yes the surf exhaust... other major difference was the change to the Polk stereo head unit vs the Clarion on the 2013s. Not much else besides graphics.