RPM rear A-arms for the SC10 4x4 are molded in black from our trademark blend of extremely durable materials and are backed by our limited lifetime warranty. Once again, strength and durability were primary design considerations for these rear A-arms. Similar to the fronts, hinge pin and cross-holes such as shock mounts and anti-sway bar holes have been beefed up for some serious muscle. The structure of the A-arms is also dramatically different than the stock design, which not only helps with the strength and sturdiness of the overall design, it also helps contribute to a stronger, less flexible design than the stock A-arms. All this extra strength and at a weight that is actually 2-1/2 grams per A-arm lighter than stock A-arms, for a total weight loss of 5 grams!