Changing your header?  Got a new engine going in?  Then you will want to change your gaskets!  There is 2 gaskets that connect your header to your engine block that need to be replaced.  This GrimmSpeed Head to Exhaust Manifold Dual Port Gaskets Subaru Turbo Models gasket is what you need!  Sold in pairs. 

Order one (1) for a complete left/right set.