so i bought an incomplete set of skunk2 alpha series valves that was missing one intake valve and one exhaust, so i found an intake valve online but cant find an exhaust by itself, my question is could i use a different brand with the same specs? or by a new set of exhaust valves?

 

skunk wont sell you individual valves?

 

I've tried and they said it's been discontinued

 

As long as the dimensions are the same, I wouldn't worry about it.

The only thing to really check would be having the installed height of the valve spring the same.