DOT 5 may be used to replaceeither DOT 3 or DOT 4 if a complete system flush is done

and 4mm thick

72-77 GT550

direct replacement

6" long x 2

athena spark plug hole gasket for honda BS90 DOT 5 may be usedAthena Spark Plug Hole Gasket for Honda Spark plug hole gaskets are seals used to help prevent engine oil and debris entering the spark plug shaft in the valve cover. Quality OE style replacements. Athena offers the widest range of replacement gaskets on the market and has over 50 years of experience supplying OE gaskets for some of the world's largest motorcycle manufacturers. Features: Manufactured in state of the art computer controlled facilities