Yes I have searched and researched, and I came across articles with people saying that Skunk2 valves are more likely to result in a dropped valve, and something about some Ferrea valves.

What I want to know what valves all of you guys would recommend for a Z6-Headed D-Series motor?

Haven't decided on naturally aspirated or turbo yet...

 

ferrea valves are good

 

What causes a valve to drop like the Skunk2s obviously do on a regular basis. Does the valve just fall off of the stem, like from the metal melting or corroding away?

 

retainers breaking

 

cant complain with my stock valves

 

PM Earl on the board... he can get you Supertech valves. Im running them and didnt have any problem with them... I got the .5mm oversized one.

 

oem is great ; unless its absolutely necessary to use aftermarket.
Opinion might me a little biased since i dont trust aftermarket valves.
but if so, i would go ferrea

 

yeah ferrea's quality is pretty good