I realize that after my 7M engine and cylinder head build up I will have a new choke point, my exhaust manifold and turbo charger.

Is it best to just scour ebay and find a similar to stock exhaust mani ready for a wastegate and T04? I've also seen some full kits on ebay for the 7M that claim 700hp.. and the pics that coincide are impressive enough for me to believe it, but they run from 3k - 5k.

Im really in the dark on where to look for this paticular upgrade for the 7M. It sure would be sweet to have a stainless tubular header, but I would buy a tig welder before i buy would buy a manifold for $1200, but I geuss the full kit could be worth it.

Anyway, info on the smart thing to do is much appreciated.

I would buy a used kit off ebay if I couldn't build a manifold myself, the full blitz and HKS kits show up fairly often from time to time for around $1200. The only ones to stay away from are the cheap knock-offs, specificly anything SSAutoChrome or MasterPower. There's a twins manifold on ebay right now for 1300, pretty steep price for the fact that it doesn't have turbo's with it. Powerhouse racing also sells cast HKS replica manifolds.