I can't recall what the boost number were when I ran the d-tech as a single, been a while since I installed the d-tech s-400 twins, but I can say it had a better overall range of performance than the stock turbo. It is a mechanical wastegate, is adjustable, so you can actually set it the way you want it. You have to get the plug for your electronic wastegate wiring, don't forget to make sure you get it when you order the turbo.
CD