All the info on plugs are in the top two threads, and the info to work out what type of rocker cover you have vs if you need spacers. I did try the coils without the spacers at first and they fitted really nice, but got the spacers cos i think they look good.
I found with awsome they did not advertise the spacers but call them and ask for them, and they have a fresh batch in.
As for the valve, as Tuffty says it is a diverter. But that is a temp pipe that will be going,lol.