External wastegate placement is crucial!! Some do it to 90 degrees off the manifold, some do it 180 degrees from the top of the stock manifold, some do it off the turbine housing. Basically you need the external wastegate as close as possible to the turbine wheel but BEFORE the turbine wheel to vent the gasses which spin the turbine i.e. The place for it is either coming off the manifold or welded onto the turbine housing (both before the turbine wheel). If you put it past the turbine wheel on the dump pipe it isnt going to rid gasses before the wheel now is it? :wink: