First, let me clear things up a bit. I own a 2008 Pontiac G8GTHe's fitting these on a 1-series not an E46
Your new wheel is 25.4mm wider, effectively 12.7mm more outside and 12.7 inside when compared to stock. With a +45, your new wheel will stick out 28.4mm closer to your fender than your current 8". Go to your car and measure how much room you have back there.
Trying to get some info....PYSpeed has the VMR 710 9.5" wheel listed with an available +50mm offset on both 18" and 19" wheels.
Is this +50mm offset truly available, or is it a mistake on their website?
Help is always appreciated,