This Stage 1 Kit delivers the maximum level of performance (+4 MPH) through easily installed air intake and pump enhancements. No internal engine modifications are required. RIVA Performance Power Filter Kit is installed. Power Filter provides greatly improved acceleration and a 150~200rpm i...

Our Stage 2 Kit provides the ultimate performance increase for your RXT with no heavy internal engine modifications required. We designed this kit to deliver loads of reliable power (+25HP / +7 MPH) with easily installed engine & handling components. Requires the use of 91+ octane pump fuel. R...