Yokomo Y2-018AR2PA Aluminum rear shock tower (Purple) for YD-2 series  [Y2-018AR2PA]

That is an aluminum straight back shock tower employed in the YD-2 series. There are many top arm mounting holes so the upper supply are attached to the surface to fit the brief suspension arm. Basically, when using a short suspension arm, utilize exterior opening to produce the top supply shorter, so when utilizing a typical suspension system arm, set the top supply much longer utilizing the internal top supply mounting space to achieve the right camber change. It really is now configurable.