RPM A-arms incorporate all stock geometry; yet have been redesigned for strength, looks, performance, and durability. These rear A-arms have been designed to lower the A-arms center of gravity without affecting ride height or stock geometry for better handling characteristics as well. In addition, RPM Nitro Rustler & Stampede rear A-arms are actually lighter than stock components! These A-arms carry our reputable warranty against breakage and are molded from our trademark blend of nylons for bulletproof performance and unrivaled durability. These A-arm sets are sold in pairs and come in either black or our extremely popular blue, which is molded into the A-arm for unparalleled scratch resistant color.