How do you increase torque in a 5.3 Chevy motor?

To increase torque in a 5.3 Chevy motor, consider upgrading the intake and exhaust systems to improve airflow, which can enhance engine efficiency. Installing a performance camshaft designed for torque can also help, as it optimizes the engine's power band. Additionally, tuning the engine's ECU with a performance chip or software can adjust fuel maps and timing to maximize torque output. Finally, consider adding headers or a high-performance exhaust system to reduce back pressure and improve overall performance.