DET port sizes?

[Jason Garrett Young]

the only difference that I am aware of is the the DET and some of the DE's
from Japan/Australia, etc have 7mm valves stems instead of the 6mm, but the
head of the valve is the same size

the sodium filled valves are the bigger ones, and I have seem them on NA
motors

> I don't know about the valves, but I'd guess they are the same size.
There's
> not a lot of room for larger valves in the SR20 head.