Exotek HPI Sport 3 Aluminum Ultra Light Differential ...
Gear. This optional differential gear is an excellent way to reduce rotating weight and add strength to your HPI Sport 3's drivetrain. Constructed from CNC machined aluminum and hard anodized for durability ...
are available in 70 and 78 tooth options. The 70 is recommended for stock and spec class applications as it will provide higher top speed, while the 78 will provide better bottom ...