| WS6 basically summed it. Wait till the springs settle in and take it to a shop to get aligned. Lowering any vehicle, you will experience negative camber (where the inside of the wheel is sitting heavier then the outside). The shop may be able to adjust it 1 degree or so. If it is still off, they'll recommend a camber kit.
With the negative camber, you'll actually get better handling through the twisties (assuming the camber isn't HORRIBLY off) but the tires will wear faster. Especially since it's a 40-series sidewall.
-Ducky
__________________  |