Great feedback JPEG23. I believe with the differential change and possibly doing the Dinan intake and software upgrade, is the most you can get out of the 6. Getting a 13% increase is a big step up in power as most after market add on do not come close in reality. This is something I would definitely do but unfortunately I have to cool my heels until my warranty ends on the car.
2008 650 Convertible- 6 Speed manual- Sport package- HUD- Lane Departure- Comfort Access- Merino Leather- HD Radio- SAT