Currie F9, F10 Portal Axle Overdrive Gear Set - For Vanquish Products SCX10-II Portal, VS4-10 Ultra, and VS4-10 Phoenix F10 Portal Axles.  

Specifications:

• Included gear set when purchasing SCX10-II Portal axles
• 1.67:1 gear ratio compared to 1.4:1 gear ratio of Overdrive Gears
• For use in the rear axle of the VS4-10 Ultra or VS4-10 Phoenix (VPS09007) to achieve front overdrive

Note: Does not fit Axial Capra, Axial SCX10III