Well, I've decided to purchased all new 4's -- here are my contents in route: - Toyo Proxes 4 275/35/18 (front) - Toyo R888 305/35/18 (rear) - XXR 521 Black/Polished Lip 18x10 (all around) During my order process, I was prompted for this "install kit": http://www.nlmotoring.com/Circuit-Performance-Wheel-Installation-Kit-p/wheelinstallkit.htm I ordered it as well with these specs: 1/2" Black Bolts 73.1 -> 70.6 Aluminum Hub Centric Rings Now, the question is.. Do these rings serve the same purpose as the LFP hubcentric spacers as they look nothing like each other? Are these "rings" spacers or just special adapting rings? Do I need the LFP 3/8" spacers (18x10 setup) AND these rings? ..or should I toss these things? .. I just received them today, they look like big c**k rings. Thanks!