New from Serpent come several option parts for the S977 Viper 1/8th on-road car. Starting with a 38g bottom brass weight, the part is designed to fit into the pre-shaped chassis slots in order to alter the weight distribution of the car. One or more weights can be added and the weight itself comes black anodized and with its mass etched into the surface. Also new is a radio plate aluminium bracket that makes for a more rigid centre of the chassis. The CNC-machined part comes grey anodized to match the remainder of the chassis. Also new are eccentric short body posts that allow to relocate the body a couple of millimeters back and forth in order to adjust the overall aerodynamics and weight distribution.