This is a set of optional RPM Upper and Lower Rear A-Arms for the Traxxas 1/16 scale Slash 4x4 VXL and Rally VXL. FEATURES: Composite plastic construction, red in color 30° bevel at leading and trailing edges that reduces chance of breaking Eliminates nearly all A-arm slop allowing camber, caster and toe angle settings to be more firmly fixed in position INCLUDES: Upper and Lower Rear A-Arms with Instruction Sheet jxs 03/27/12 ir/jxs