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04-05
Chevy/GMC - 6.6L Duramax LLY
Cool Sound. Cool Tip.
- 100% stainless, not aluminized!
- Improves flow up to 176%; virtually no backpressure
- Giant polished rolled-edge tip
- Muffler’s expansion chamber cuts the drone
- A perfect fit
Monster® Exhaust
Physical fitment.
Why consider a cheap, ill-fitting aluminized exhaust? Banks 4” Monster Exhaust is made of rugged, long-lasting 100% stainless steel. It fits better than the competition, because Monster Exhaust utilizes the factory hangers and maintains proper clearance to all under-vehicle components.
All flow, show and go!
With nearly five decades of engineering airflow improvements, Banks has mastered the art of maximizing flow while minimizing backpressure. The polished straight-through Monster Muffler, mandrel-bent intermediate pipe(s) and tailpipe nearly triple the exhaust flow, cut backpressure up to 98%, lower exhaust gas temps and deliver more power to the ground. And the 5” polished rolled-edge tip has a double-walled design with a ½” air gap to keep heat from tarnishing the mirror finish.
Engineered to ditch the drone.
Many straight-through mufflers deliver an obnoxious drone that overpowers conversations. Banks Monster Muffler is extensively sound-tested and engineered with a unique expansion chamber and high-temperature packing. Instead of a drone, you’re treated to a rich exhaust note that’s authoritative, yet civil. It sounds as great as it looks!
| Application | Year Range | Part # |
|---|---|---|
| Monster exhaust system LB7 | Std cab, long bed | No cat converter | 2001-04 | 48628 |
| Monster exhaust system, 4" LB7 | Ext/crew cab, short bed | No cat converter | 2001-04 | 48629 |
| Monster exhaust system, 4" LB7 | Ext/crew cab, long bed | No cat converter | 2001-04 | 48630 |
| Monster exhaust LB7, LLY | Std cab, long bed | Cat converter | 2002-05 | 48632 |
| Monster exhaust system LB7, LLY | Ext/crew cab, short bed | Cat converter | 2002-05 | 48633 |
| Monster exhaust system, 4" LB7, LLY | Ext/crew cab, long bed | Cat converter | 2002-05 | 48634 |
Owners Manual(s)
| Exhaust- Monster Exhaust, Single Passenger side exit (LB7, LLY, LBZ) '01-07 (Part #96408) |  Download |
'04 Dmax exhaust/tuner: Flat Out F-----g Flys
2005-11-10
Tony of Huntingtown, Maryland, installed a Six-Gun Diesel Tuner, Speed-Loader and Monster exhaust on an ’04 Duramax 6.6L turbo-diesel
I had a Chevy diesel back in 1996 with Banks exhaust and remembered how good it was then, so I bought it again. I installed this exhaust in my garage — no lift, no jack. Off with the old, on with the new in 35 minutes. I build hot rods for a hobby and I have installed everything under the sun in the past 20 years and this was the nicest, cleanest and most precise install I have ever done! So needless to say I had a Six-Gun and Speed-Loader overnited to me the next day. There again, a simple, clean and neat install. I have to laugh every time I drive this beast.
FLAT OUT F-----G FLYS.
Accolades
“Considering the fact that the fuel economy savings are substantial and the fact that the stainless steel exhaust will last the life of the vehicle, the Banks system is well worth the investment.”
Ford Truck World (May '03)