Athearn ATH98542 HO Sound Ready Underframe, SD40/45 Summit Parts The compact dimensions make this

The compact dimensions make this battery suitable for applications where battery space and weight are limited

Made for the Traxxas TRX-4 as listed in the title

Part number TKR5415

Portal drive axle mount

Athearn ATH98542 HO Sound Ready Underframe, SD40/45 Summit Parts The compact dimensions make thisAthearn ATH98542 HO Sound Ready Underframe, SD40 45 Overview: Three benefits to Genesis power to your RTR Locomotives: Streamlined DCC speed curves Lower motor current draw Quieter motor operation for DCC Sound Features Earlier models that don't have the Sound Ready starburst on the box will require this underframe in order to use the Genesis Motor Retrofit Kit (ATHG63839) available separately. Simple Installation Includes all weights Included