The CAT4300 Performance Module fits C15 & C18 Acert Caterpillar off highway engines. This diesel performance module is designed for fuel economy with up to 30% increase in hp and fuel savings up to 10%-20%. Adjustable from your electronic device via our Ag Diesel Solutions Bluetooth Connect App or the included mechanical switch. You can change your settings from stock, +15% & +30% hp. The module doesn’t flash the ECM, instead it receives the data from the ECM, optimizes the signal to the engine improving the fuel efficiency and power. These savings ensure a quick return on investment so you can enjoy greater efficiency and less cost. Plug-and-play connectivity means there’s no need to cut, splice or modify engine wiring. All Ag Diesel Solutions modules are Made in the U.S.A.