This Cylinder Head Seals with the Cylinder great with its double o-ring design.
However, it does not seal properly with the Guarder Air Seal Nozzle. I was getting a horrible loss of compression due to this.
I also tried a Prometheus Air Nozzle, which sealed better but still nowhere good enough.
I eventually modified the Prometheus Air Nozzle with an SHS O-ring to achieve proper seal.
I would stay away from this Cylinder Head.
Double O-ring design seals great with the cylinder. machining also looks great.
Does not seal properly with Guarder M14 Air Nozzle, or Prometheus M14 air nozzle.
I was required to modify my Prometheus air nozzle to make it work.
The Guarder air nozzle I initially tried was horribly incompatible with this Cylinder. Strange since Guarder usually makes excellent air seal parts.