Descrizione The Serpent Viper 990R is the ultimate 1/8th racing platform. Built on the highly successful 990 EVO, the 990R meticulously improves performance, quality and ease of use. It features an all-new chassis, redesigned fuel tank, upgraded rear bulkheads, improved rear anti-roll bar mounts, a new bumper, a redesigned gearbox shaft to enhance performance, and a host of enhanced, user-friendly details for even better performance, reliability and ease of use.