I have an exhaust mani with the flange for the external gate, but I want to put a 90 degree elbow on it so that the wastegate sits horizontal and not verticle. I need to know what metal to use for the elbow that will resist the heat from the exhaust. I will be making a run out to a few shops in the next week to pick up a bunch of the little parts like this so that I can get my turbo finished.

thanks