LOL. It's an AMS kit and I think they have at least half and idea what they are doing!!

The Turbine Housing has the normal discharge and Wastegate hole as though it was Internally 'gated, but with no flap. The hole is enlarged too. Then the Turbo Elbow is divided and the Wastegate section of the housing goes directly into a Tial 38mm Wastegate, which in turn discharges directly into the main exhaust.

I'll put a pic up of Gary's new Turbo elbow that Chris has just made next week. Will make sense then.