what ever you do, do NOT buy the Kyokugen lug nuts. They are probally the shittiest of all designed lugnuts. The Lug nut is seven sided, which means you have to use a key to get every lug off. Doesn't sound so bad, but the key is about as strong as playdough. You have to torque them down with a torque wrench to no more then 80lbs, other wise the key will strip. Even with using a trq wrench, the key will still start to round out. On mine, I called the company to get an extra key. When it arived, I then rotated my tires, again using a trq wrench. When I was starting to trq down the final lugs, the key was already starting to round. When it rounds, the lug nuts get stuck inside the key, and the only way to get them out is banging the key on the ground (if your taking them off) or pound the wrench over the key a few times to knock it loose (if you putting them back on)
Aftermarket lugs are needed. The OEM style lug nuts are acorn style. Basicly what that means, is instead of being just a tapered edge that goes into the wheel, it is slightly rounded. This is fine for OEM wheels because, OEM wheels also have this acorn pattern to them also. With aftermarket wheels however, most use the more comman V style where the sides look more like a cone with the top cut off. If you use the acorn style lugs on these, the lug will only be touching the wheel at on circular point instead of the entire lug area.