Looks like they are making the mistake at the factory.

22623366 Carb Intake Restrictor 3000k is what I ordered from tower originally. Its the piece that fit the old 60, 90 size carb into the engine. I think they are making the mistake at the factory, all these inserts and restrictors can get confusing. I just need the one piece that makes my K engine a K, the piece that fits inside the 4500 carb to restrict airflow.

The part number that was on the package was SUPG2420, just like you have above. It fits inside the engine where the carb goes, but not INSIDE the carb like I expected.

thanks,

coveredup