I'm currently looking at doing a turbo MX5 project using a TD04 Impreza turbo.

And my turbo will be bolting to my turbo manifold and downpipe just like an Impreza, instead of using inconel studs and fasterners. The holes on the manifold are not threaded which I think is the same as an impreza manifold.

How do you Impreza guys find that the bolts hold up during spirited driving or light track use? Do you have any issues with the bolts coming loose? If so what solutions do you use?

Pic is my custom manifold

 

The manifold to up-pipe is not threaded it is just a nut and bolt. I believe that it may be a locking nut and they are high temp ones. The up-pipe to turbo uses studs and nuts as either the turbo or pipe is threaded (cant remember which). As for them coming undone... it's never happened to me. Most people have trouble getting the nuts/studs undone as once they have been super heated they seize right up no matter how much copper slip you use.