eSG40 Electronic StraightGate BlackTS 0563 1002 eSG40 Electronic StraightGate Black Introducing the TS 0563 1002 eSG40 Electronic StraightGate Black the smallest butterfly style external wastegate designed for tight engine bay confines. The eSG40 is a zero offset butterfly style wastegate that delivers enormous flow and almost linear control, offering unparalleled boost control throughout the entire operating range. Turbosmarts eSG40 Electronic StraightGate is Patent Pending and builds