Aluminum reduced suspension holder the BACKSIDE for the front suspension system. Redesigned combined with HS bulkheads for an expanded selection of set-up adjustments. The downward orientation associated with suspension owner is employed mainly for Dirt tracks. The upward orientation regarding the suspension system holder is employed mainly for Carpet tracks. The suspension system holders enable use of the long or standard suspension system arm configurations. Machined from premium Swiss 7075 T6 aluminum and black coated. Fits XB4'21