RPM 70192 - Susp. Arms Rear Black (Pair) Rival MT8RPM70192 Rear A arms for the Associated Rival MT8 Black Notes: Sold in pairs Replaces the rear A arms from stock Associated #25911 Thicker, tougher and stronger than stock Front A arms also available RPM Rear A arms for the Associated Rival MT8 are designed to improve durability over stock A arms. How did we do it? First, by increasing the amount of material surrounding the inner hinge pins by 7%, then increasing the width of that thicker diameter by