Exhaust manifold and valves?

[DatsunZ31]

So I decided I'm going to run a compound turbo on my RB20 (T3BB/HX35) and on top im thinking of running a anti-lag kit as well.

does anyone make a inconel manifold for the RB25/RB26? possible to use titinaum? (light weightness LOL )

does anyone make inconel valves for the RB20? or should i use sodium filled exhaust valves?

[Skym]

Not sure about manifold, but Supertech make inconel valves for RB20DET.

[BenOswald]

Holy **** $$$