Athearn #G63839 HO Genesis Motor Retrofit Kit for RTR SD45/SD40

Key Features Used with the DCC-Sound Ready underframe only. Earlier models that don't have the Sound Ready starburst on the box will be able to obtain the underframe (ATH98542) separately. Simple Installation Molded on motor saddle mounts Included extended Dog-Bone universal Included mounting screws Balanced Flywheels DCC Ready! NMRA 8 pin and Decoder Harness plugs Pre-soldered motor wire leads Overview Three benefits to Genesis power to your RTR Locomotives Streamlined DCC speed curves Lower motor current draw Quieter motor operation for DCC Sound