Appreciate the props on my rims...prolly wont get the same props at MOAB though
MKW (m19)makes a rim that is very similar to mine and perhaps it comes in a 6lug.
The BMW numbers in fact depict the engine and but also depict the series. The first numeral is the series and the next two is the engine size(in liters). A 528 is a five series with a 2.8 liter engine(which was replaced by the 3.0 around 2001). My wifes car is a 3 series with the 3.0 engine.
btw, welcome to the board.