Use of nitrated piston rings
relation to chromium-plated rings higher
hardness and more favorable sliding qualities.
Unfortunately not yet for all sizes available.
Coated bearing surfaces for better intake
behavior and reserves during highest load
and lack lubrication (e.g. cold weather
starting, washed off lubricating film in case of
failure of the spark plug, etc.).
Small series and one-off
from 4 pieces) are possible!
The price depends on the working on intensity.