I have for sell a used Invidia Turbo Manifold that I bought from a member on here with about 1000 miles on it. I put roughly another 1000 miles on it. Only reason I'm getting rid on it is due to the manifold being to close to my upper radiator hose and me not wanting to purchase a EVO 6 radiator. I also have a used Invidia O2 housing. One of the holes that mount to the downpipe was stripped and drilled out, but it mounts perfectly with a nut or you can just retread it before you install. Both items have zero cracks.

Invidia Turbo Manifold: Sold
Invidia O2 Housing: Sold