With its central plug layout similar to the Vespa T5 design it cares for optimum and pinking-free combustion. With its symmetrical flow design it delivers more power while running cooler, a more than welcome effect for the air cooled engines.
With its strong layout it is suitable to further mill the head for longstroke conversion or race cylinders of other brands like Polini, Parmakit, and similar.
Material choice and Manufacturing are excellent for longevity and thermal stability.
The cylinder head cowling needs to be slightly modified for the spark plug hole. Cylinder head nuts should be applied crosswise with not more than 1.8-max.2.2kgm at best using a torque wrench.
-Symetrical flow design
-Compatible to different cylinders