Response to Good morning. I believe the plate you have may read sp1600F5 not spi600fs. Please double check the i or 1, for if it is a 1600 then yes it is the same part. Hayward puts the X in part numbers listed in their catalogs but not on the part itself. A little confusing. If it is an i on the plate, I am not sure. If a question still persists, please take a few pictures of your whole pump and send them to me  and I will see what I can figure out for you.

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