The crack was a hairline that was repaired by a wheel shop prior to me purchasing them, as you can see in the pic I provided in the original post it was welded with additional build up. As such, the repaired crack is a non-issue. I drove on them for 9 months. The vibration feels the same as if a wheel weight fell off. You only feel it from around 40-50mph, its not present prior to or after that. When I had all 3 poly engine mounts and didn't even notice it anymore.
<---check the Avatar '00 Turbo ZX3 - 224whp 228tq 13.38 1/4 - sold :(
'08 EVO GSR Perrin drop-in filter, HKS cat back - sold
'02 SVT - Quaife, intake, FC TB, FR header, CFM HFC, FR multimatic, Tom's tune - sold
'08 VW R32