This design continues to use the more expensive low carbon 316L stainless in schedule 10 thickness, not the 304 that most fabricators use. Due to the very low carbon, it's less likely to carburize (become brittle) over extended high temperature use . These material choices have been proven by other starquest owners with many tens of thousands of miles of use/abuse.
This unit pictured below is currently for sale, and I have several others in progress. This unit is complete and ready to ship, with a T-3 flange, and 38 mm Tial V-band wastegate flange (industry standard). It also has an 1/8" NPT port in the collector for an EGT sensor, you can plug that if you wish.
Manifold flange is plasma-slotted, this allows the flange to flex just a little to minimize stress on the studs and prevents warpage.
Others in progress will include a T4 model, and a Mitsu flanged model, and more T-3's to come. I can use any wastegate flange, just specify what you want to to use. I stock the Tial 38 mm v-band, Tial 44 mm v-band, and the common Tial 38 mm 2 bolt, others require special order or customer supplied. EGT bungs are inclusded at no cost.
Price is $520 shipped. Add $10 if using pay-pal to cover part of the fees ($530).
I will also be developing a budget friendly T-3 log, and a stock style manifold that puts the mitsu flange in the stock location, designed to be a stock replacement part. These I have made before, I'm just re-starting production.