Valve stem seals - dumb ?

[majestic]

You need 4 intake and 4 exhaust, right?

[MikeFleming]

If you're talking the factory, stock ones (from 1987+, black and brown oems), then yes.

Most (some?) aftermarket mfgrs use same both sides. The low-profile ones from Essy are same for all eight seals,

The exhaust ones do get hotter though.