This product is a heavy-duty suspension arm set designed to deliver increased strength and durability for high-performance RC driving. It is constructed from impact-resistant composite material to withstand extreme bashing, hard landings, and rough terrain conditions. The precision-molded design maintains proper suspension geometry while providing a direct factory replacement fit. It is compatible with Traxxas Maxx models, including 89076-4 and 89086-4 configurations that use part 8999X suspension arms.