Redcat Racing Blue Aluminum Hop-Up Kit for the Tornado EPX and EPX Pro models. Includes the following Aluminum parts: Steering Knuckles (02131), Turnbuckles with machined rod ends (2 of 06048B), Rear Hub Carriers (02130b), Rear Lower Suspension Arms (06049b), Front Hub Carriers (02132b), and Front Lower Arms (06050). All necessary hardware included.