The upper arms also have revised cross shaft geometry, requiring less shim stack to achieve negative camber on lowered cars, or race and pro touring vehicles with aggressive alignments.BMR Suspension AA012 Non - Adjustable Upper A - arms are available in black hammertone and red powdercoat for long - lasting good looks. Installation time is 3 - 4 hours. Proudly made in the U.S.A.Control arm hardware kit RH007 (Includes upper and lower control arm hardware - Highly Recommended) also available.