The X4F chassis is made for the CFF suspension system hands which are installed via pivot balls straight to the framework. The X4F framework works together the motor mount and bulkheads using alignment holes the centering pins on each associated with mounted elements. As a result of the centering pins, the assembly of structural components is hassle free, & most significantly the components resist motion in a collision to allow you complete the race without losing pace. The narrower design associated with the framework alongside the perfectly symmetrical shape offer optimal flex characteristics. Fits X4F
