Aluminum straight back Lower Suspension Holder BACK for semi-split bulkheads offer an expanded selection of set-up corrections. The aluminum suspension system holders function incorporated Suspension Settings™ (I.S.S.) enabling for fast & effortless suspension system system geometry environment. Making use of eccentric suspension system bushings placed into aluminum suspension holders – including extra suspension system system shims – the XB8 suspension system geometry are completely modified in just seconds. Machined from premium Swiss 7075 T6 aluminum and black coated.