RB INNOVATIONS RBK10549 Traxxas Revo Super-Charger System RBVG1145 This is the RB Innovations Nitro Super-Charger for the Traxxas Revo.Includes: RB Innovations Nitro Super-Charger with one Mounting Bracket, one Idler Pulley, one Belt, one Anti-Kink Spring, one Chrome Intake Pipe, one flexible 15" and 3-3/4" flexible section of Tubing, one Two Shoe Flywheel, two Decal Sheets, one Engine Performance Enhancement/Tuning Sheet, and one Instruction ManualRequires: Installation and tuning