From their website. I pulled this for the LS because they do not show one for the GX550 yet.What’s the Pedal Commander?
"Pedal Commander is a little device that connects to Lexus LS 's accelerator gas pedal with OEM factory Plugs to Improve Throttle Response. Which modern vehicles are often having a delay between pressing the accelerator pedal and the engine responding. This delay, known as throttle lag, can be frustrating, especially in situations where immediate acceleration is needed. A Pedal Commander significantly reduces this lag, providing a more responsive and engaging driving experience."