as the title says, are they all the same? I have a d16y7 that is in perfect condition and I have a z6 that has a few burnt valves and I was trying to save myself some money if I could replace these with the ones from my good head. I believe the springs from vtec to non vtec are different I know but I am not sure about the valves, hoping someone can shed some light for me. Google was no help and so far I can't find this answer on some other forums I've checked.

 

Yes, the valves in these engines are interchangeable

 

good to know, just wanted to make sure. Thanks