SuperXterra2003,......... maybe some info on your X if your going to ask that, such as is it SC, or NA model? If you got the SC version, then your getting what your gonna get and thats about it. The only other thing I've thought about with mine was maybe changing it to an electric fan instead of belt driven, figure that might add 1 to 2 mpgs on a good day. But, I dont have the funding right now to do so, or try and figure it out and I dont think they make a drop in elec. fan for mine.