Rotary Valve Covers are sold on an even exchange basis.
How to Identify your Rotary Cover.
Step 1 – Remove the cover and manifold off the ski. See the Install/Removal Guides for details. Sea-Doo
Step 2 – Separate the intake manifold (what the carb(s) bolt to) from the rotary valve cover. The number location is shown above indicated by the red arrow
6810-520, 6810-522, 6810-525, 6810-527, 6810-737, 810-030, 810-038, 811-030, 911-161, 911-165, 911-169