I just ordered a supercharger and the question is. the 2006 car will stay daily driver and with the increased hp will the gearing change be a good and needed change and what gears would be a suitable set?
What kind of supercharger are you getting? Centri?
What kind of daily driving do you do? 3-5 miles of city? Or 25+ miles on the highway?
It all comes down to your preference. If you can live with higher rpm on the highway and a little less fuel economy, then I'd go with either 3.73 or 4.10. If serious about it, I'd also look at a limited slip at the same time.....or check out the links below and try to grab an 8.8 axle with the said items. Little more for the price, but a lot more reliable, especially with the blower.