That wastegate flange look as if it would fit a 35/38mm tial wastegate but im not sure because the shape look kind of weird. The manifold also have rust on it, is there anyway i can get the rust off and keep them off?

 

Yeah, That's a 35/38mm flange. As for the rust, take a wire wheel to it. If you don't have access to one just get some finer grit sandpaper and remove all of the rust by hand. After all of the rust is gone coat it w/ a high temp enamel. I have some that is good to like 1500 degrees or so. I am in the same boat and that is what I will be doing.

Phil

 

sand blast it

 

Cool, I can get those 1500 Degree engine paint but are they good enough. I have a feeling they will crack off when the manifold get too hot?