To use this product, first make sure your vehicle is parked on a flat surface and the engine is cool. Remove the old exhaust system carefully following the vehicle's manual. Then, install the HKS Hi - Power SPEC - L2 6BA - FK7 L15C by aligning it with the mounting points. Tighten all the bolts securely. When driving with this exhaust system, avoid hitting curbs or rough terrain that could damage it. For maintenance, regularly check the bolts for tightness and look for any signs of rust or damage. If you notice any issues, have it inspected by a professional.