Black Felpro valve seals

[CyFi6]

I recently put my cylinder head together and used a Felpro gasket kit i had laying around for the valve stem seals. I believe the package said "Premium Valve Seals" but i cant remember exactly as it was a while back. I have read that the brown ones are superior and are made of a different material. Is there any truth behind this? Is it worth taking my head apart and changing to the other seals before i put the engine together or are the black ones just fine? Thanks for any help.

 

[Zumtizzle]

Black tends to be Rubber.

Brown tends to be viton.

tends is the key word, as viton can be dyed any color.

 

[IBoughtASupra]

I used the seals from the "Safety Gasket" set and they are better because it holds onto the head better. Use a little bit of engine head paste as well.