Beach RC says....

Developed for the rigorous demands of the ET410, this new chassis has received improvements to increase its durability and lifespan. By making small changes to a few key areas, we were able to directly link the A block with the chassis. With this change, most of the force from an extreme frontal impact is transferred into the chassis, resulting in a tougher front end assembly. Chassis wear characteristics have also improved by slightly reducing the height of the B block, allowing for more material at the chassis kickup.

TKR6051B is also backward compatible with the EB410 when used with the hinge pin braces mentioned below.

Requirements

TKR6540B and TKR6541B hinge pin braces are required with this chassis.
 

Vehicle Compatibility

• TKR6501B - Chassis (revised, 7075, 3mm, hard anodized, lightened, ET410 EB410) is included with the EB410.2, ET410 and ET410.2 kits and can be used as a replacement part for those vehicles.
• This can be used with the EB410 vehicle and should be a direct replacement for the stock part or used as a new feature. Please use the instruction manual for the kit(s) listed to verify compatibility and no additional items are necessary before purchasing.