RE: just purchased a 2006 4.0L...need options on lowering car
No you dont need new struts...Depending on how much extra money you have you could get a bump steer kit to go with it its reccomended if you happen to have caster camber platers. Personally i would either go with eibach steeda or h&r springs. Those are good companies for lowering the car but thats just my 2 cents. Enjoy the springs when ya get em