Join Date: Jun 2006
Location: Ballston Spa, NY
Again, Burns Stainless. You won't find a finer collector anywhere. Download their X-design form and fill out the necessary information. they will build a collector to suit your application that will be second to none. Be prepared for a hefty bill(~$2000+) for anything made in 321 stainless and TIG'ed by them for a pair of header collector and a turbo collector.
Your merge collectors on the headers (each side) will be a 3-1 style, your turbo collector will only have two inlets, one for each side, and they can factor in a dump to attach a wastegate flange to it if you'd like to have an equal pressure dump(to equalize exhaust pressure in each manifold, unlike stock 930/965 setups).
Talk to Vince. Great guy and he'll get you what you need....