Fitment suggestions
 

What would be a good fitment on a eg6 if I get diamond racing steelies?

Not sure what you mean good fitment. Are you talking about tires, or offset, or rim size?

He is talking about rim's I guess,diamond racing steelies would be better option and even it would give an nice outlook to Your Car too.

No **** spammer. We are in the Tires, wheels, suspension section, aren't we?

Nice link you have in your signature. Oh wait. Give me 30 seconds and it is getting removed. Post again with it and you will find yourself banned.

OP, you need to give us more information as to what you are asking. You can different sizes in those strectch steelies looking wheels.