I need to fix my heads, replace some valves on a phase 1 2.2

 

What style valve spring compressor works best on these? If the "C" style,

 

what size adapter will I need for it, or.. is there a particular tool that comes with the right size adapter?

You can use the C clamp type. The valve cap is tiny though. I don't know the exact width, but I think it's less than an inch.

I used a bolt on type compressor that was more of a PITA than it helped. Probably could have pushed the valve down by hand with the right tool to push it with.