Aluminum Front-Rear (FR) suspension system owner for Semi-Split Bulkheads provide an expanded range of set-up adjustments. The aluminum suspension holders feature Integrated Suspension Settings™ (I.S.S.) makes it possible for for fast & simple suspension system geometry setting. Using eccentric suspension bushings placed into aluminum suspension system holders – plus additional suspension system shims – the XB8 suspension system geometry can be completely adjusted in only seconds. Machined from premium Swiss 7075 T6 aluminum and black coated.