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![Team Associated - Reedy Sonic 540-M4 Mod Rotor, 12.3 x 5.0 x 25.3 - Hobby Recreation Products](http://www.hobbyrecreationproducts.com/cdn/shop/files/team-associated-reedy-sonic-540-m4-mod-rotor-123-x-50-x-253-887987_436x436.jpg?v=1713914418)
Fine-tune your Reedy Sonic 540-M4 motor for varying track conditions and applications with an optional rotor. Each rotor is laser etched with its specification and part number for easy identification and technical inspection.