Aluminum Rear-Rear suspension holder for semi-split bulkheads offer an expanded selection of set-up modifications. The aluminum suspension system holders feature built-in Suspension Settings™ (I.S.S.) allowing for quick & effortless suspension geometry environment. Using eccentric suspension system bushings placed into aluminum suspension system holders – as well as additional suspension shims – the XT8 suspension geometry may be totally modified in mere moments. Machined from premium Swiss 7075 T6 aluminum and black coated.