These are hardened steel drive yokes for the Traxxas Rustler and Stampede.
Hardened steel construction and is stronger than stock parts.
These yokes also come with U-Joints pre-installed for ease of installation.
Two hardened steel yokes with pre-installed U-Joints.
Nothing, this part is a direct fit for stock drive yokes, only harder
This is a "hop-up" part, not stock.