Molded composite rear lower suspension arms with 2-holes for optional setting. Inner position is used for increased steering, outer position is used for more stable handling. Extra-hard composite mixture arms (labeled “XH”) for foam-tire racing. The specially-formulated composite material allows for a very light yet very durable suspension arm that can withstand the rigors of high-performance racing with foam tires. Can be also used for rubber tires. Fits XRAY T2, T3 cars.