596 head performance mods

I know about the tulip/semi tulip valves and there reasoning behind using them and all the low lift flow .150-.400. Doesn't sell me.

The valves I have are 1 piece, made in argentina....wait...guess what? mopar valves are made there too, did you know that?
Ever buy big valves for a set of RT's @ 18.99 ea.? If yo have then you've seen the same packaging I have, the same packaging thats wrapped around my intake valves right now=made in argentina.

BTW I run 347lbs open pressure w/mancini's stainless replacement semi tulips right now and no valves are falling apart, done this with stock valves too.

I think if your running big lifts .550 & up the nail head valves [chevy valves] are great, now if your running under .525 lift then maybe you should stick to the tulip style.imo

Not trying to sound like an a hole here, just telling what I know.

Bobby, more insight would be nice to your reasoning.