We don't just make parts, we design and manufacture engines. Carefully applying this science and engineering to our line of tuning products provides you with big, safe, and consistent power delivery every time. Derringer, Six-Gun, and Economind are the only inline tuners that communicate with your truck's ECM to make intelligent, real-time calculations, even compensating for altitude. All Banks tuners include patent safety systems that protect your engine, transmission, and emissions equipment.