Subaru FB20 Exhaust Pipe Gasket

In the Subaru F series (FA20 & FB20) engine, their exhaust manifold gasket is actually design same size as the EJ series (EJ20 & EJ25) engine, but in the exhaust pipe side, the gasket as shown in the photo for the F series, is slightly bigger compare to the EJ series type.

But when we looking at the FA20 (Subaru BRZ) gasket kit, this gasket didn't seems under the content of the gasket kit, but it can be found in the FB 20 for the Subaru WRX model gasket kit. Even the FB20 for the Subaru XV model don't have this piece in their gasket kit content.