This is the Vantage Racing Revo 3.3 One-Way Center Drive Shaft Set.  If you are building up a high-performance or race Revo, you should have this part.  These are great for racing and it is designed to improve your cornering when you have to get off the throttle in the corner.  These are great for racing Revos.

Vantage Racing products are known for their quality, performance, and outstanding looks.  Be sure to check out our other Vantage products to help your vehicle stand out from the crowd!