How can you get more hp from your 4.6v8 thunderbird?

To increase horsepower in your 4.6 V8 Thunderbird, consider upgrading the air intake system to improve airflow, which can enhance engine performance. Installing a high-performance exhaust system will also help reduce back pressure and improve exhaust flow. Additionally, reprogramming the engine's ECU with a performance tune can optimize fuel delivery and ignition timing. Lastly, maintaining proper engine health with regular maintenance can ensure you're getting the best performance from your vehicle.