Banks Power Derringer Tuner with iDash 1.8 SuperGauge (66681)

A tuner changes how the engine computer manages fuel and boost so the engine makes more power without any new hardware. The Derringer plugs into the truck rather than rewriting the factory computer, and this version comes bundled with the iDash 1.8 SuperGauge, a small display that shows live readings like boost and exhaust temperature.

why this one — The bundled gauge is the reason to pick this over a bare tuner. On a diesel you want to actually watch exhaust gas temperature and boost while you use the added power, and the iDash gives you that instead of asking you to trust a power level blindly. Two things to know: Banks states the product is 50-state compliant but publishes no CARB Executive Order number on this page, so we make no street-legal claim for it, and the gain figure is Banks' own, with one reseller quoting a noticeably lower number for the same part.