VXS is correct. They are Blowsion Tubbies. I had an issue with the lower end of the engine and I am waiting on a set of 62T cases to wrap this ski up. The current case had a helicoil repair and the girdle bolt pulled it loose. So, I thought it best to find a set of used cases and get it back together asap. This ski has the following modifications.
701 Engine 62T
ADA Girdled Head
Factory B Pipe with FX-1 chamber
MSD Ignition Enhancer
Blowsion Tubbies
Twin 38 carbs
Ocean Pro Vortex F/A
Pro-Tec ride plate and deep scoop
Solas 19-25 impeller
Blowsion turf & chin pad