I put these on over a year ago with few miles on them and bought them used which came with gm style lugs and washers. If I recall correctly I purchased the lugs and correct washers from them directly. The lugs look like normal mag style shank with the washers being offset slightly not quite as aggressive as normal unilug washers. I do know the stud is very close to the inside edge of the wheel hub to the point I cannot fit a normal lug wrench in there using a socket is a must. Is this how your fit?