440 Source Head Opinions?
It’s pretty rare that a new head assembly, as built by the manufacturer(as opposed to being assembled with unknown parts from an on-line retailer) would have “problems” serious enough to cause a potential failure.
That’s not to say that things are always roses and unicorns though.
Here is a valve out of a Stealth head with maybe a hundred or so miles on it.
This wasn’t causing a problem...... and maybe never would have.
But that’s not the same thing as saying it’s “right”.
The shiny line is the point of contact with the seat.
It’s pretty rare that a new head assembly, as built by the manufacturer(as opposed to being assembled with unknown parts from an on-line retailer) would have “problems” serious enough to cause a potential failure.
That’s not to say that things are always roses and unicorns though.
Here is a valve out of a Stealth head with maybe a hundred or so miles on it.
This wasn’t causing a problem...... and maybe never would have.
But that’s not the same thing as saying it’s “right”.
The shiny line is the point of contact with the seat.
