These high performance head gaskets have a stainless steel ring (fire ring) around the combustion chamber to prevent blow out. They are .042" thick. They have proven to work very well!
AVAILABLE IN TWO SIZES:
• 80mm for the 305 cc
• 84mm for the stock bore 342 cc is no longer available!!! I have them for an oversize bore of 86mm or 3.398 inches
It is recommended to use a light coating of a good sealer such as Honda or Toyota Bond or Permatex "The Right Stuff" silicone sealer on both sides of the gasket.