Now available… 4423 impellers. Designed, manufactured, and tested in USA. Two materials available: HiPerf and OEM type.
HP: https://ebay.io/m/wGPTRm
OEM: https://ebay.io/m/ilG22j
I recently purchased and in the process of restoring a 1955 Crestliner Viking Deluxe. Currently working on the air horn. It works (meaning I put air to it and it sounds off loud); however, I'm not sure all the internal pieces are installed. The hollow "needle" part is loose inside (installed...