Turbo to manifold gasket

[GNICETRY]

Noticed that my gasket is blown out on passenger side. From what I understand the most ideal way to seal is no gasket, true surfaces and a slight layer of copper rtv. What is second best way? Remflex? Copper? Just copper RTV?

Also does the turbo have to come off or can you 'slip' it in between?

 

[MikeS]

I’ve used the remflex gasket from Mark at TR custom parts both times I swapped turbos. Going on 20yrs no leaks.