Help. Valve Stem Seal

I am in the middle of putting in some 918 springs.

I ordered some valve stem seals from Thunder Racing.
The ones that are currenly on the truck look like a washer-spacer-seal in one.
Thunder just sent me the seal. 16pcs all the same size.
The manual says the intake and exhaust are different.

Do I need to go buy the washer-spacer in one?

Also, in the bottom picture, is this part of the valve or the head?

Thanks

Attachment 4501

the bronze piece is the valve guide. Do not mess with it, it is pressed into the head.

The seals you want will be made of Viton. All 16 seals can be Viton with no issues. If you're putting in beehive springs then you need the hat style like came off it, IIRC. The Viton seals are exhaust seals but work on both intake and exhaust.

Thanks, I will see if I can find anywhere local that sells them.