There are at least 2 different 6 lug kits. One made by CPP and one made by Performance online. Most of the vendors get the kits from these 2 suppliers.

I have used the CPP kit, and am curently dealing with their customer service about bearings. I don't have anything positive to say about CPP's customer service, or the quality of the bearings supplied for extra money. I have gone threw 2 sets of the roller bearings in 3 years. I will update this if CPP's customer service surprises me and replaces this last set.