Big Boss Performance Tuner - 9 Pin

Experience the easiest way to unleash power and efficiency from your diesel engine with the BIG BOSS® Performance Tuner – 9 Pin, the ultimate diesel truck tuner for professional drivers and fleet owners. This plug-and-play handheld tuner connects directly to your diagnostic port, giving you instant access to proven PDI tuning technology that boosts horsepower, torque, and fuel economy—all with the push of a button.

Developed by Performance Diesel Inc., the Big Boss Tuner combines years of industry-leading engineering into a simple, durable device. Its user-friendly interface lets you customize digital gauges, adjust vehicle settings, and read or clear diagnostic codes without complicated software.

Choose from multiple performance and economy stages to fit your truck’s setup and driving style—whether you’re hauling heavy loads, running long highway routes, or optimizing for maximum mileage. Reliable, efficient, and powerful, the Big Boss Performance Tuner – 9 Pin gives you full control of your diesel truck’s performance.