Pro Marine O Ring, VST Seal Compatible with Yamaha V6 EFI 1999 & Up only Replaces: 66K-14984-00-00 18-0711 Pro Marine Provides the highest Quality in aftermarket parts for all your Marine needs! O Ring, VST Seal Compatible with Yamaha V6 EFI 1999 & Up only Pro #: 4984 Replaces: 66K-14984-00-00 18-0711