I have just spent several hours pouring over the 2009 parts fiche looking for anything different compared to the 2008 models. I have a 49 state WRX, so keep this in mind when you read this. There may be some other differences between the X and R (and California bikes). So, except for the obvious black plastic, black seat and graphics differences, here is what I found that is different and/or updated for the 2009 bike... 1. Cam chain guides mounting bolts are a different number. 2. Crankshaft main bearings. The bearing on the left side is a different number now. In '08 both left and right main bearings were the same number. I find this very interesting. Anyone know anything about this? 3. The U-shaped brace on the left side that holds the AIS, Reg/Rect, horn, etc... has different bolts holding it to the frame. 4. The tool kit appears to have an extra rubber plug or grommet thing on the top now. My bike only has a support on the bottom of the tool kit. But the '09 diagram shows something that looks like a welded on projection above the tool kit too (for added support?). Can anyone with an '09 confirm this? 5. The front caliper has a different pin on the lower side. I'm no brake expert, so I can't explain it very well. It looks like it supports the caliper. Not sure if the R has this since the front calipers are different. 6. The radiator assembly is a different number, and so are the button head allen bolts and spring nuts that hold the shroud and fins to the radiator. I wonder what is different about the radiator? Can anybody who has seen both bikes tell any difference in the rads? 7. The black plastic cover over the front of the coolant overflow tank on the left side of the bike is a different number. Maybe something to do with #3 above? 8. The rear sprocket is a different number, but I believe we have already determined that the difference is the lack of the black plastic ring on the '09 bikes. 9. The '09 bikes also have different rear axle blocks (chain pullers) on both sides. 10. The rear brake pedal is a different number. Anyone got a pic of the '09 brake pedal? Different shape maybe? 11. The big whale tail rear fender is a different number as are some of the mounting bolts for the metal brace underneath it. 12. The taillight assembly is a different number. Not sure what would be different about it though. ??? That is all I found different between my '08 WRX and the '09 WRX. My guess is most of the same holds true for you R² owners.