usually with downpipes u have your flange |- and a pipe butted to it (placed against), and welded around the perimiter of the pipe. this creates a "step" in flow. you have your opening from the turbo flange, then this open pipe all of a sudden. its not a smooth transition. The way were doing it is, you form the downpipe to the same shape as the flanges opening, and stuff it in the pipe and weld it up from the inside. So now you have a smooth transition from the turbo to the downpipe.
i dont know if it will make u regret it. If people follow through and get this, they wont be dissapointed. I cant do much with the price other than not mark them up. This place wont cut corners and if you ask them to, they wont make it. I have tremendous respect for that.