Not sure about lowering the car. True that the center of gravity will be a bit lower, but in the end, probably not much. The LCA's on the other will improve the launch. You will notice this the first time you drive the car after installation. The aftermarket parts are a vast improvement on the slush from the factory.
Redfire Metallic 2006 4.0L V6
JLT CAI, SCT 93 Octane Performance tune, GT Take-off Rear Swaybar, Screamin' Demon Coil, NGK plugs, Borg-Warner cables