Banks Power 06-07 Chev 6.6L LLY-LBZ Six-Gun Diesel Tuner w/ SwitchOptimum fuel tuning for awesome power, built in safety and adjust on the fly power, plus temperature limiting control. Tuning that doesn't kill the host vehicle. Many tuners reduce fuel delivery as exhaust gas temps rise. But they ignore the powertrain! Banks finds the limits of the engine and powertrain, then adds mission critical ActiveSafety safeguards to Six Gun so it won't exceed those limits. As a result, Six Gun thrashes challengers, not your