Okay I have a square set of 17x8 and I'm wanting to to staggered. I was wondering if there was barrels I could just buy that are 9" barrels. I know there are sets of 17x9 but does the barrel pattern for the bolts work? If so is there a way I can just buy the barrels from bmw or what not. I want to go 9" in the rear but not familar on where to go and what to do. I want to retain my centers because of the fact that are hub centric to my E36. Thanks for future help and saying hello to the forum.