Buy Diesel Performance and Gas Performance Products Factory Direct: 800-601-8072
04-05
Chevy/GMC - 6.6L Duramax LLY
Ultimate Sport Power System
- Intake, intercooler & exhaust upgrades + advanced tuning
- Massive continuous, useable power
- Honors the host vehicle & improves longevity
- 92 mph in the ¼-mile
- It’s like a stallion on steroids!
Gains Up To:+124 hp/+303 lb-ft
Big Hoss® Bundle
Let it flow.
Banks Big Hoss Bundle replaces the power-robbing factory airflow inefficiencies—including the intercooler—with free-flowing components that dramatically increase intake airflow and air density and expel exhaust with virtually no backpressure.
Colossal power with staying power.
Banks balances the improved airflow with advanced CleanTune™ Technology that adds up to 54% more horsepower and up to 68% more torque than stock without adding black smoke. This is tire-shredding, scenery-blurring constant-duty power that keeps its cool while blasting you from 0-60 mph 24% quicker and 148 feet before stock!
The secret to longer life.
Forget mis-matched components. Run away from tuners that can destroy your engine. Everything in the Big Hoss Bundle is engineered to work together to maximize your engine’s power, efficiency and durability. Big Hoss honors your vehicle by safely living within the limits of your engine. Your Duramax will run stronger and live longer!
All gains measured at the rear wheels
Watch the featured video! This short segment from ESPN's Truck Stop gives an overview of the Big Hoss Bundle, as installed on professional snowboarder Tara Dakides' truck. (She's got an '03 Duramax, so there may be some variance between this system and the one made specifically for your truck.)
Here's the TEST REPORT
for your vehicle!
Get a hard copy in the mail »
View it right now online »
Stock vs. Big Hoss Bundle
6.6L Duramax | 2005 Chevy Silverado 2500 standard cab, long bed, single rear wheel with Allison 5-speed automatic trans
*Note: Six-Gun & Speed-Loader/Banks iQ are recommended for off-road/racing use only. Banks' results as tested on highest level of Six-Gun with Banks iQ and recommended airflow improvements.
Who knows more about your Duramax than Banks? Banks designed and built the 6.6L Sidewinder S-10, which is the quickest and fastest ever diesel-powered drag racing pickup truck. It holds the national quarter-mile record at 7.77 seconds at 180 mph! And it did it without the billowing black smoke common with improperly tuned diesels. Moral to the story? No one knows more about boosting Duramax performance safely and reliably than Banks.
System Includes:
 |
Banks Ram-Air® Intake System
Flowbench developed, dyno proven. Improves airflow up to 57%; adds up to +39 hp/+69 lb-ft more than a tuner alone! Enclosed cold-air box; huge 7-1/8" outlet. |
 |
Monster® Diesel Duals Exhaust
4” stainless split-dual system more than doubles stock flow & cuts backpressure 98% for more power & lower EGTs; rich, throaty sound; huge polished tips; safely clears spare tire Or choose the single exhaust... |
 |
Monster® Exhaust
4" stainless constant-diameter pipes and straight-thru muffler improve flow up to 176% and lower EGTs. Cuts backpressure up to 98%; rich, throaty sound. Of choose the dual exhaust... |
 |
Six-Gun® Diesel Tuner & Banks iQ®
|
 |
Techni-Cooler® Intercooler System
Everything about Techni-Cooler is bigger, including the core area, which has 34% more flow volume. Increases air density for more continuous power. Watch the video... |
 |
Monster Muffler
|
| Application | Year Range | Part # |
|---|---|---|
| Big Hoss Bundle, single exhaust LLY engine | Std cab, long bed | 2004-05 | 47737 |
| Big Hoss Bundle, single exhaust LLY engine | Ext/crew cab, short bed | 2004-05 | 47738 |
| Big Hoss Bundle, single exhaust LLY engine | Ext/crew cab, long bed | 2004-05 | 47739 |
| Big Hoss Bundle, with Diesel Duals LLY engine | Std cab, long bed | 2004-05 | 47740 |
| Big Hoss Bundle, with Diesel Duals LLY engine | Ext/crew cab, short bed | 2004-05 | 47741 |
| Big Hoss Bundle, with Diesel Duals LLY engine | Ext/crew cab, long bed | 2004-05 | 47742 |
LLY Big Hoss Bundle: We Can Now Walk the Dog off of Any Other Vehicles on the Road
2006-01-14
Justin of Heightstown, New Jersey, installed a Big Hoss Bundle on an ’05 GMC with a 6.6L Duramax turbo-diesel
I am a mechanic and installed three Big Hoss Bundles on two 2005 Dodge Dullies owned by my buddies, Bill Cruz and Steve Hodap, who bought my kit for installing theirs. What a great deal!! I installed the Big Hoss on my 2005 GMC as well, all in one weekend. All three trucks have amazed the s#!t out of us with the performance that we were able to get out of them. I truly believe that we can now walk the dog off of any other vehicles on the road. This was the first install of any Banks parts that I have done and everything fit great—I had no trouble installing anything. The toughest part was teaching the trucks the right shift patterns. Otherwise, everything was great. Thanks for the fun that we are going to have!!
Why an Intercooler Upgrade Makes Perfect Sense
Watch Stacey David of TrucksTV explain why an intercooler upgrade makes perfect sense -- and power!
Ram-Air development
Gale talks with SpeedTV about what went into developing the Ram-Air cold air intake system. (Note: Some components or designs shown may not be available for all applications.)
Big Hoss Bundle installation
Maximum airflow and ultimate power. Watch and learn the importance of airflow, how to increase your power output safely, why you need to upgrade your intercooler, cold air intake, exhaust... (this is a Duramax LMM, other trucks may vary).
PowerPDA on "TrucksTV"
The guys on TrucksTV have showcased the Banks PowerPDA a number of times, and here they are going over some of the highlights. (The PowerPDA has been upgraded to the Banks iQ)
Featured Video:
Banks Big Hoss Bundle Overview
Accolades
“When looking for increased power, look no further than Gale Banks Engineering, one of the industry’s leaders and innovators.”
Truckin' (Nov '04)