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RPM 82354 Green Upper & Lower A-arms Traxxas X-Maxx #7729 8IGHT Parts Genuine HPI Racing replacement partRPM 82354 Green Upper & Lower A arms Traxxas X Maxx Traxxas #7729 Description: Immediately after Traxxas released the X Maxx, RPM customers started notifying us that they needed stronger A arms that could handle the weight and the punishment these massive trucks can dish out. We reviewed numerous photos of damage to stock A arms to see where the weak points were, then reviewed a set of new A arms to see what we could do to improve both strength and