Waterbox upgrade

I have a seadoo challenger with twin 255 motors. I want to possibly upgrade the stock water boxes but it looks like riva only has a high performance waterbox for the 300. Would they work on my engines or are not tuned correctly for the 255? Thanks

They would not likely fit. You’ll have to cross reference some parts to see if there is a ski model that uses the same box. I’d look into the GTX of the same year and see if the part numbers are the same