The Banks Six-Gun Tuner offers the highest proven horsepower and torque. Only Six-Gun is Stacked for Power™ to tune pulse width, timing and fuel pressure, all in one device. No need to buy two competitive products to do what Banks Six-Gun Tuner does on its own! Six-Gun provides six levels of power the user can change on-the-fly by simply turning a dash-mounted knob; and contains a suite of electronic AutoRate™ and ActiveSafety™ features to safeguard the powertrain.

2001-2004 GM Duramax applications can expect up to +128 hp and +345 lb-ft of power, and with Speed-Loader, up to +155 hp and +385 lb-ft (with recommended Six-Gun Bundle airflow improvements).

2003-2004 Ford 6.0L Powerstroke owners can expect up to +115 hp and +206 lb-ft of ground-chewing power, and with Speed-Loader, up to +138 hp and +231 lb-ft (with recommended Six-Gun Bundle airflow improvements).