Unlock the full potential of your equipment with the AG Diesel Solutions CAPS8390 Performance Module. Engineered, built, and tested by PSI Power specifically for 8.3L and 9.0L Cummins engines. Designed for farmers and construction crews, this plug-and-play diesel performance module delivers more horsepower, higher torque, and improved fuel efficiency — all while keeping your engine safe and without affecting emissions. Whether you’re running long days in the field or managing demanding workloads, the CAPS8390 module gives your Cummins-powered machinery the strength, responsiveness, and reliability you need to get the job done faster. Increased Horsepower & TorqueExperience noticeable gains in pulling power and throttle response. Tackle larger implements, move faster in the field, and make tough jobs easier with added engine performance exactly when you need it. Enhanced Fuel Efficiency: Save on diesel costs while maintaining peak power. Optimized fuel delivery ensures your engine runs more efficiently — helping you spend less time fueling and more time working. Plug-and-Play Installation: Install your module in minutes — no cutting, splicing, or special tools required. The simple plug-and-play design makes upgrading your equipment quick and hassle-free. Warranty-Safe Performance: Designed to work seamlessly with factory settings, our modules do not affect emissions or leave a trace on your ECM. Maintain full factory warranty protection while enjoying improved performance and durability. Adjustable Power Settings: Choose your preferred power level with the included 3-position mechanical switch. Customize your performance on the go for any task or condition.