The 21078 Performance Module fits LG4 Inline 6 Duramax engines from 2003 thru 2009. This diesel performance module is designed for fuel economy with up to 90 increase in hp and fuel savings up to 1-3 MPG. Adjustable with a four position switch you can adjust the power on the fly, Stock, +10%, +20%, & +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.
Best of all Ag Diesel Solutions Modules includes:
•30 day money back guarantee
•U.S. based customer service
Not for use in California. Module does not bypass, delete, or defeat any emission control systems.