Quote: Originally Posted by theski232
Ding, ding, ding!
It is in fact a Turbonetics' Racegate external wastegate for the Buick Grand National.
This 'gate is superior to a stock-style 'gate in several ways: it is a 1.80-inch, stainless steel valve compared to a "puck"-style wastegate with a hole of less than an inch; the Racegate is fully closed until it is actuated; the stock-type is open a little, which affects spoolup. Finally, one spring in the Racegate will give 9-30 psi boost, offering a much wider range of adjustment than a stock-style wastegate.
Arr, Arr, Arr
Your turn. A Guy