Way back when, Gale Banks made the water jacketed turbo risers for their twin turbo setup that had provisions built into them for wastegates. I've done some homework and spoke with Banks and they told me my best bet is finding a used set since they have not been made for many years. Please let me know what you have. I already have a set of PFM risers but they don't have wastegate provisions that I would be willing to trade, if not I have cash in hand ready to make a deal!
Thanks in advance!