Will it fit 54 inch with no bag attachment

Hi, Matt! Thanks for your question. This cover #490-7516 fits select TimeCutter zero-turn mowers model years 2006 and newer. Without knowing your model number, please feel free to utilize this guide to find/confirm your unit’s model number: https://www.toro.com/en/parts/findmodelserialplate. Once you know your model number, you should be able to find/confirm the correct cover in the parts list. Thanks!