I am picking up some 4.88 gears tonight for my lift project at complete offroad here in Dubuque IA. They have Yukon gears for $154.00 per axel, or the have a special TJ package that includes front and rear ring & pinion sets with two master install kits for $389.00 as a package deal thingy. Is it worth the extra $80.00 to get the two master install kits, are they really needed when changing out the diff gears, I am having the gears put in at a local jeep dealer btw. Otherwise the master install kits purchased seperatly are $82.00 per axel.