Looks like Mike smith is discontinuing his manis and taking orders for a final run . http://twinturbo.net/nissan/300zx/f...mith-is-Dis-Continuing-his-MSP-manifolds.html .
I saw this yesterday. I had been on the fence as to if I'd buy these for my new build. After seeing that post I put my order in straight away! They have already sold half of their final allocation!
I needed a set for mine after cracking the ams manifolds - anywhere I can still get these. What other options are there aside from stock manis?