

Calibrated for racing and 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 timing and fuel pressure; and has exclusive AutoRate™ and ActiveSafety® engine and transmission safeguards.
When you team up Six-Gun with Speed-Loader, you get temperature-limiting control that safeguards your engine. (Pyrometer gauge highly recommended.) What's more, your best gains will be even better: +126 hp and +290 lb-ft at the rear wheels.
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 with Speed-Loader |
Stock | Banks | Improvement | Results |
|---|---|---|---|---|
| Horsepower, Best gain | 160.9 hp @2400 rpm |
286.7 hp @2400 rpm |
+125.8 hp | 78% more |
| Torque, Best gain | 353.3 lb-ft @2000 rpm |
643.7 lb-ft @2000 rpm |
+290.4 lb-ft | 82% more |
| Horsepower, Peak-to-peak | 182.8 hp @2800 rpm |
286.7 hp @2400 rpm |
+103.9 hp | 57% more |
| Torque, Peak-to-peak | 358.3 lb-ft @2600 rpm |
643.7 lb-ft @2000 rpm |
+285.4 lb-ft | 80% more |
| Acceleration, time: 1⁄8 mile |
13.92 secs | 11.30 secs | -2.62 secs | 19% quicker |
| Acceleration, time: 1⁄4 mile |
20.86 secs | 17.38 secs | -3.48 secs | 17% quicker |
| Acceleration, speed: 1⁄4 mile |
70.4 mph | 81.2 mph | +10.8 mph | 15% faster |
| Acceleration: 1⁄4 mile, Trucklengths over stock* | - | - | 16.8 Trucklengths |
- |
| Acceleration, time: 0-60 mph |
15.04 secs | 9.25 secs | -5.79 secs | 38% quicker |
| *(1 trucklength = 20 ft) | ||||
| 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) | ||||
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 with Speed-Loader |
Stock | Banks | Improvement | Results |
|---|---|---|---|---|
| Horsepower, Best gain | 207.6 hp @2400 rpm |
323.2 hp @2400 rpm |
+115.6 hp | 56% more |
| Torque, Best gain | 455.8 lb-ft @2000 rpm |
725.4 lb-ft @2000 rpm |
+269.6 lb-ft | 59% more |
| Horsepower, Peak-to-peak | 235.8 hp @2800 rpm |
323.2 hp @2400 rpm |
+87.4 hp |
37% more |
| Torque, Peak-to-peak | 462.2 lb-ft @2600 rpm |
725.4 lb-ft @2000 rpm |
+263.2 lb-ft | 57% more |
| Acceleration, time: 1⁄8 mile |
11.74 sec | 10.69 sec | -1.05 sec | 9% quicker |
| Acceleration, time: 1⁄4 mile |
17.82 sec | 16.19 sec | -1.63 sec | 9% quicker |
| Acceleration, speed: 1⁄4 mile |
80.6 mph | 90.2 mph | +9.6 mph | 12% faster |
| Acceleration: 1⁄4 mile, Trucklengths over stock* | - | - | 9.1 Trucklengths |
- |
| Acceleration, time: 0-60 mph |
10.18 sec | 8.00 sec | -2.18 sec | 21% quicker |
| *(1 trucklength = 20 ft) | ||||
| 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) | ||||
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 with Speed-Loader |
Stock | Banks | Improvement | Results |
|---|---|---|---|---|
| Horsepower, Best gain | 223.0 hp @2400 rpm |
334.8 hp @2400 rpm |
+111.8 hp | 50% more |
| Torque, Best gain | 493.2 lb-ft @2000 rpm |
751.8 lb-ft @2000 rpm |
+258.6 lb-ft | 52% more |
| Horsepower, Peak-to-peak | 248.5 hp @2800 rpm |
334.8 hp @2400 rpm |
+86.3 hp | 35% more |
| Torque, Peak-to-peak | 502.0 lb-ft @1800 rpm |
751.8 lb-ft @2000 rpm |
+249.8 lb-ft | 50% more |
| Acceleration, time: 1⁄8 mile |
11.78 secs | 10.53 secs | -1.25 secs | 11% quicker |
| Acceleration, time: 1⁄4 mile |
17.70 secs | 16.00 secs | -1.70 secs | 10% quicker |
| Acceleration, speed: 1⁄4 mile |
82.2 mph | 91.5 mph | +9.3 mph | 11% faster |
| Acceleration: 1⁄4 mile, Trucklengths over stock* | - | - | 9.7 Trucklengths |
- |
| Acceleration, time: 0-60 mph |
9.76 secs | 7.68 secs | -2.08 secs | 21% quicker |
| *(1 trucklength = 20 ft) | ||||
| 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 |
| *(1 trucklength = 20 ft) | ||||
| Application | Year Range | Part # |
|---|---|---|
| Six-Gun diesel tuner with selector Dodge 5.9L, All | 2003-05 | 61022 |
| Speed-Loader (use with 61022-63797) Dodge 5.9L | 2003-07 | 62981 |
| Six-Gun diesel tuner | Selector Dodge 5.9L, All | 2006-07 | 63797 |
| Pyrometer & boost gauge assembly, electronic 01-06 Chevy, 03-06 Dodge, 03-06 Ford | 2001-06 | 64507 |
| Tuner- Six-Gun Diesel Tuner w/ optional Speed-Loader Module (235, 250, 305 HP Dodge 5.9L Cummins (24-valve) Trucks) '03-04 (Part #96448) For use with Six-Gun Switch |
|
| Tuner- Six-Gun Diesel Tuner w/ optional Speed-Loader Module, (325 HP Dodge 5.9L Cummins 600 (24-valve) Trucks) '04-05 (Part #96464) For use with Six-Gun Switch |
“We went to the source of diesel-engine performance, Gale Banks Engineering, and struck gold. Not only did it take one stop to buy and have our parts installed, but the parts worked as advertised and the results were awesome.”
Off-Road (Mar '04)