This GSC Power Division Viton exhaust valve stem seal set is specified for Honda B/K/H engine families and uses 6mm Viton seals for the exhaust valve stems. The set supplies the seals needed when replacing worn exhaust stem seals on compatible Honda engines, using Viton material noted in the description for compatibility with typical engine environments and routine valve-stem service.
GSC P-D Honda B/K/H Viton 6mm Exhaust Valve Stem Seal Set