Transmission: Allison Series 1000 5-speed automatic. Test vehicle: 2001 Chevy 3500HD, Extended Cab, Long Bed. Test Results Chevy/GMC Truck Power Turbo-diesel: 6.6L Duramax LB7, 2001-2004. With its comprehensive CleanTune Technology and change-on-the-fly power, Six-Gun rockets you from 0-60 mph 33 percent quicker and in 36 percent less distance than stock - without adding Black smoke! All gains measured at the rear wheels, with recommended airflow improvements. Calibrated for sport applications, Six-Gun is a performance junkie that adds +127 hp/+345 lb-ft. As a result, Six-Gun thrashes challengers, not your truck! Proof of a higher power. 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. Many tuners reduce fuel delivery as exhaust gas temps rise. Tuning that doesn't kill the host vehicle. Optimum fuel tuning for awesome power (+127 hp, +345 lb-ft), built-in safety and adjust-on-the-fly power, plus temperature limiting control.
