Banks Power
2003-2005 Cummins Six-Gun Diesel Tuner
Performance part for diesel trucks. Please confirm compatibility before purchasing.
Description
Description
Fits
| Year | Make | Model | Engine |
| 2003-2005 | Dodge Ram | 2500/3500 | 5.9L Cummins |
Optimum fuel tuning for awesome power, built-in safety and adjust-on-the-fly power. Calibrated for sport, Six-Gun is a fully engineered diesel tuner with an unmatched combination of power, safety and versatility. It delivers pavement-shredding best gains of +105 hp and +258 lb-ft at the rear wheels. Has 6 change-on-the-fly power levels. Is Stacked for Power to tune timing and fuel pressure. Also has exclusive AutoRate and ActiveSafety engine and transmission safeguards. Horsepower and torque measured at rear wheels.
Features
- Gain up to 105 HP, 258 ft/lbs TQ at rear wheels
- Choose between 6 power levels though iDash
- Destroys the competition, not your vehicle!
- Optimum fuel tuning for awesome power
- DataMonster logs temps, pressures, speeds, etc
- iDash displays temps, pressures, speeds, etc
- Record and review datalogs directly on iDash
- ActiveSafety protects engine/powertrain
- Loaded with Features
- Easy Install
Notes
- Banks Horsepower and Torque tests were performed with recommended airflow improvements.
- Upgradeable options include Banks iDash DataMonster or SuperGauge and airflow components to build a complete engineered power system.
- For best Six-Gun Tuner performance, Banks always recommends airflow improvements.
Installation
- Click Here, Diesel Tuners - 2003-2007 Dodge 5.9L
- Click Here, Banks iDash
- Click Here, iDash 1.8 for Banks Bus 1 Quick Start Guide
Additional Information
235-hp Rated Engine
Test vehicle: 2003 Dodge RAM 3500 Quad Cab • 2wd Dually
Engine: 5.9L Cummins ISB (235-hp rated) • Transmission: 4-speed automatic
Horsepower and torque measured at rear wheels.

Note: Banks Horsepower and Torque tests performed with recommended airflow improvements
| Six-Gun, Level 6 | Stock | Banks | Improvement | Results |
|---|---|---|---|---|
| Horsepower, Best gain | 147.7 hp @2200 rpm |
252.5 hp @2200 rpm |
+104.8 hp | 71% more |
| Torque, Best gain | 353.3 lb-ft @2000 rpm |
611.0 lb-ft @2000 rpm |
+257.7 lb-ft | 73% more |
| Horsepower, Peak-to-peak | 182.8 hp @2800 rpm |
263.7 hp @2400 rpm |
+80.9 hp | 44% more |
| Torque, Peak-to-peak | 358.3 lb-ft @2600 rpm |
611.4 lb-ft @1800 rpm |
+253.1 lb-ft | 71% more |
| Acceleration, time: 1/8 mile |
13.92 secs | 11.62 secs | -2.30 secs | 17% quicker |
| Acceleration, time: 1/4 mile |
20.86 secs | 17.92 secs | -2.94 secs | 14% quicker |
| Acceleration, speed: 1/4 mile |
70.4 mph | 77.6 mph | +7.2 mph | 10% faster |
| Acceleration: 1/4 mile, Trucklengths over stock* | - | - | 14.3 Trucklengths |
- |
| Acceleration, time: 0-60 mph |
15.04 secs | 10.05 secs | -4.99 secs | 33% quicker |
| *(1 trucklength = 20 ft) | ||||
305-hp Rated Engine
Test vehicle: 2004 Dodge RAM 3500 Quad Cab • 2wd Dually
Engine: 5.9L Cummins ISB (305-hp rated) • Transmission: 4-speed automatic (48RE)
Horsepower and torque measured at rear wheels.

Note: Banks Horsepower and Torque tests performed with recommended airflow improvements
| Six-Gun, Level 6 | Stock | Banks | Improvement | Results |
|---|---|---|---|---|
| Horsepower, Best gain | 190.5 hp @2200 rpm |
280.0 hp @2200 rpm |
+89.5 hp | 47% more |
| Torque, Best gain | 448.0 lb-ft @1800 rpm |
678.0 lb-ft @1800 rpm |
+230.0 lb-ft | 51% more |
| Horsepower, Peak-to-peak | 235.8 hp @2800 rpm |
292.5 hp @2400 rpm |
+56.7 hp | 24% more |
| Torque, Peak-to-peak | 462.2 lb-ft @2600 rpm |
678.0 lb-ft @1800 rpm |
+215.8 lb-ft | 47% more |
| Acceleration, time: 1/8 mile |
11.74 sec | 10.98 sec | -0.76 sec | 7% quicker |
| Acceleration, time: 1/4 mile |
17.82 sec | 16.70 sec | -1.12 sec | 6% quicker |
| Acceleration, speed: 1/4 mile |
80.6 mph | 86.4 mph | +5.8 mph | 7% faster |
| Acceleration: 1/4 mile, Trucklengths over stock* | - | - | 6.3 Trucklengths |
- |
| Acceleration, time: 0-60 mph |
10.18 sec | 8.61 sec | -1.57 sec | 15% quicker |
| *(1 trucklength = 20 ft) | ||||
325/600 Engine
Test vehicle: 2004 Dodge RAM 3500 Quad Cab • 4wd Dually
Engine: 5.9L Cummins ISB (325/600) • Transmission: 4-speed automatic (48RE)
Horsepower and torque measured at rear wheels.

Note: Banks Horsepower and Torque tests performed with recommended airflow improvements
| Six-Gun, Level 6 | Stock | Banks | Improvement | Results |
|---|---|---|---|---|
| Horsepower, Best gain | 206.1 hp @2200 rpm |
308.1 hp @2200 rpm |
+102.0 hp | 49% more |
| Torque, Best gain | 493.2 lb-ft @2000 rpm |
745.4 lb-ft @2000 rpm |
+252.2 lb-ft | 51% more |
| Horsepower, Peak-to-peak | 248.5 hp @2800 rpm |
321.6 hp @2400 rpm |
+73.1 hp | 29% more |
| Torque, Peak-to-peak | 502.0 lb-ft @1800 rpm |
745.4 lb-ft @2000 rpm |
+243.4 lb-ft | 48% more |
| Acceleration, time: 1/8 mile |
11.78 sec | 10.59 sec | -1.19 sec | 10% quicker |
| Acceleration, time: 1/4 mile |
17.70 sec | 16.13 sec | -1.57 sec | 9% quicker |
| Acceleration, speed: 1/4 mile |
82.2 mph | 88.9 mph | +6.7 mph | 8% faster |
| Acceleration: 1/4 mile, Trucklengths over stock* | - | - | 9.0 Trucklengths |
- |
| Acceleration, time: 0-60 mph |
9.76 sec | 7.81 sec | -1.95 sec | 20% quicker |
Compatible trucks
Shipping info
Please refer to our Shipping policy. As a general rule, we ship out all orders in 24-72 hours using services like Purolator and other, and always provide you with a tracking number.
Disclaimer & warranty
Please refer to our Disclaimer and Warranty pages.
Planning a larger purchase? Feel free to reach out to discuss a possible discount.
If you have any questions or need help with your order, you’re always welcome to contact us directly.
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