Im not sure what the bore is but the thread pitch for lug nuts will be 12x1.5.
Unless you buy Mugen which don't require themIf going with aftermarket wheels you'll probably have to get an adapter for the hub,
Im pretty sure if you throw up some wheels you like someone might be able to photoshop them on the ILX.Damn wonder which one will look the best on the ilx. rarely even seen mugens come in 17s. unless you can spot mf10s