Your new manifold will arrive as the casting only. No studs or nuts are included. You will need to remove the heat shield from the old one and transfer to the new. The 6 studs and nuts that hold it on will almost certainly break off when you remove it. Then there are the 2 studs and nuts that hold on the o2 sensor/plate, then there's the 3 studs and nuts that hold the down-pipe to the manifold. Even if you are successful in removing the old studs and nuts I wouldn't recommend re-using them because they lose strength over time due to the severe service of these locations. Tim