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’82-95 GM 7.4L
The Ultimate Power System for Towing & Work
Eliminates factory restrictions with free-flowing intake and exhaust components. Top gains: +79 hp and +96 lb-ft (rear wheel), plus 19% better fuel economy.
Gains Up To:+79 hp/+96 lb-ft
PowerPack® System
Banks PowerPack includes stainless-steel TorqueTubes, the industry's only exhaust manifolds specifically tuned for use in motorhomes. Banks scouts out factory-bred sloppiness and restrictions, replacing them with free-flowing, durable intake and exhaust components that work in concert to optimize power, torque, mileage and durability. PowerPack attains top gains of +79 hp and +96 lb-ft torque, with 19% better fuel economy—without expensive high octane.
Important: Some vehicle configurations require an extension kit for proper fit.
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Single-air pump |
Dual-air pump |
Electronic Fuel Injection |
Test vehicle: 31-foot GM 7.4L motorhome, P-30 chassis, throttle-body injected
Horsepower and torque measured at rear wheels.
| PowerPack® System | Stock | Banks | Improvement | Results |
|---|---|---|---|---|
| Horsepower, best gain | 142.9 hp (4400 rpm) | 221.4 hp (4400 rpm) | +78.5 horsepower | 55% more (4400 rpm) |
| Horsepower, peak-to-peak | 177.0 hp (3300 rpm) | 233.3 hp (4000 rpm) | +56.3 horsepower | 32% more, peak-to-peak |
| Horsepower, upshift point (at wide-open throttle) | 146.0 hp (4300 rpm) | 224.0 hp (4300 rpm) | +78.0 horsepower | 53% more (4300 rpm) |
| Torque, best gain | 186.8 lb-ft (4200 rpm) | 283.1 lb-ft (4200 rpm) | +96.3 lb-ft torque | 52% more (4200 rpm) |
| Torque, peak-to-peak | 342.3 lb-ft (1800 rpm) | 402.9 lb-ft (1800 rpm) | +60.6 lb-ft torque | 18% more, peak-to-peak |
| Torque, downshift point (at wide-open throttle) | 312.1 lb-ft (2600 rpm) | 393.5 lb-ft (2600 rpm) | +81.4 lb-ft torque | 26% more (2600 rpm) |
| Exhaust gas temperature | 1,552°F | 1,388°F | -164°F | 11% cooler |
| Exhaust backpressure (at equal airflow) | 7.5 psi | 0.75 psi | -6.75 psi | 90% less backpressure |
| Air cleaner vacuum (at equal horsepower) | 17.0 in/H2O | 2.4 in/H2O | -14.6 in/H2O | 86% less restriction |
| 0-60 mph acceleration, time | 24.19 sec | 18.38 sec | -5.81 sec | 24% quicker |
| 0-60 mph acceleration, distance | 1,325 ft | 1,008 ft | -317 ft | 24% less distance |
| 40-60 mph acceleration, time | 12.73 sec | 9.42 sec | -3.31 sec | 26% quicker |
| Maximum speed, hill-climb (6% grade) | 57 mph | 68 mph | +11 mph | 19% faster |
| Fuel economy (over 7,000-mile test route) | 6.90 mpg | 8.25 mpg | +1.35 mpg | 20% better mileage |
| Best Gains |
|---|
| +58 horsepower |
| +64 lb-ft torque |
| 11% better mileage |
System Includes:
| Application | Year Range | Part # |
|---|---|---|
| PowerPack System, stainless Class-A motorhome | EFI* |
1982-95 | 49069 |
| PowerPack System, stainless Class-A motorhome | Carbureted, single air pump* |
1982-95 | 49051 |
| PowerPack System, stainless Class-A motorhome | Carbureted, dual air pump* |
1982-95 | 49052 |
| Extension kit, stainless (179-208" wheelbase) GM 454 MH EFI, 179"-208" W/b |
49154 | |
| Extension kit, stainless (209-228" wheelbase) GM 454 MH EFI, 209"-228" W/b |
49155 | |
| Extension kit, stainless (179-208" wheelbase) GM 454 MH Carb, 179"-208" W/b |
49150 | |
| Extension kit, stainless (209-228" wheelbase) GM 454 MH Carb, 209"-228" W/b |
49152 | |
| Wire extension, O2 sensor GM 454 EFI, Late |
1982-95 | 62306 |
| Starter heatshield kit GM 454, Truck/Motorhome |
26120 | |
| Oil filter heatshield kit GM 454 Truck/Motorhome |
26123 | |
| Heatshield kit, muffler (26.5"L) GM 454 MH, Carbureted |
26100 | |
| Chrome tailpipe heatshield kit, 3.5" tailpipe (19"L) Use With 3 1/2" Tail Pipes |
26106 | |
| Chrome tailpipe heat shield kit, 3" tailpipe (24"L) Use With 3" Tail Pipes |
26105 |
Owners Manual(s)
| PowerPack system (Carbureted, single air pump) (Part #96340) |  Download |
| PowerPack system (Carbureted, dual air pump) (Part #96341) | Download |
Accolades
“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)