Yokomo Y2-018AR2RA Aluminum rear shock tower (Red) for YD-2 series  [Y2-018AR2RA]

That is an aluminum back surprise tower found in the YD-2 series. There are more upper arm mounting holes so your top supply is attached to the outside to fit the quick suspension system supply. Fundamentally, when utilizing a quick suspension arm, make use of the exterior opening setting the upper arm shorter, so when making use of a standard suspension system supply, set the top of arm much longer using the internal upper arm mounting opening to attain a suitable camber change. It is now configurable.