I have a stock 4-bolt 3" TH style internal wastegate downpipe that I just took off my car weekend before last. It was working great when I removed it. It should work with a 66mm turbine wheel equipped turbo no problem. Flapper valve swings freely and it does have a larger than stock puck. It was controlling 25psi with my current setup. Only reason for changing was I upgraded to an external wastegated 3" downpipe. I only snapped one quick pic during the swap, but I can take more if you'd like?
How does $350 shipped with the dump pipe, or $300 shipped without the dump pipe sound?
Let me know and I can snap a few more pics if you'd like.
-Patrick-