Wich valves from actual experence will flow better in a smallish 1.94 size.Im looking at the 12* heads and the 10* heads..Im not trying to take a day off of work and spend $500 on a flow bench so if somebody has some insight id apriceate it a lot.

 

The 12* will flow better with a stock type of head, There are some advantages to the 10* such as if you are going to turn a lot of rpm, the 10* is quite a bit lighter than the 12*, and can be made to flow as well as the 12* if you know what you are doing portwork wise.

So, most applications I would run a 12* unless I was going to turn a lot of rpm regularly, I would get the 10* and make it work.