Spacer sizes

Okay fellas, as I eagerly await my DG springs to come in and have installed, I was looking at my wheels and thought I could flush my wheels more, especially after the drop.

I'm rocking 18x8.5 Enkeis on 235/40/18 tires. The rears could use a bit more poke, the fronts look fine.

"Usually" you just need 5mm more in the back than the front, to get them flush.
So at least a 5mm spacer, IMO

But I'd get the springs put on first and THEN figure out how much more you can space them out