

4" stainless constant-diameter pipes and straight-thru muffler dramatically improve flow and lower EGTs. Virtually eliminates backpressure; rich, throaty sound.
The 4" Monster exhaust system flows up to 122% better than stock and virtually eliminates backpressure. The system's pipes bolt behind the turbocharger (some applications). Banks' streamlined 4" turbine outlet pipe (not required with 325 hp systems), intermediate pipe(s) and tailpipe are formed of stainless, heavy-wall tubing with constant-diameter bends to maximize airflow and lower exhaust gas temps.
Banks replaces the factory's restrictive muffler with a polished-stainless Monster muffler featuring a straight-through 4"-diameter path that flows up to 129% better than stock. The Banks-designed expansion chamber dissipates the annoying mid-range exhaust drone that accompanies most straight-through mufflers. Monster muffler utilizes spun ceramic, very-high-temperature packing and delivers an authoritative--but never intrusive--exhaust sound. A huge 5" polished-stainless steel tailpipe tip sports a rolled edge. Double-walled design with 1/2" air gap keeps heat from tarnishing the exterior mirror finish. Adjustable clamp for positioning on tailpipe.

| Application | Year Range | Part # |
|---|---|---|
| Monster exhaust system Std cab, long bed (or crew cab, short bed) | Cat converter | 2003-04 | 48640 |
| Monster exhaust system Std cab, long bed (or crew cab, short bed) | No cat converter | 2003-04 | 48641 |
| Monster exhaust system Crew cab, long bed | Cat converter | 2003-04 | 48642 |
| Monster exhaust system Crew cab, long bed | No cat converter | 2003-04 | 48643 |
| Monster exhaust system 325-hp engine | Std cab, long bed (or crew cab, short bed) | 2004-07 | 48700 |
| Monster exhaust system 325-hp engine | Crew cab, long bed | 2004-07 | 48701 |
| Monster Exhaust system 325-hp engine | Mega-cab | 2006-07 | 48708 |
| Monster exhaust ('03-04) (Part #96422) | |
| Monster exhaust '04-07 (5.9L HO 325hp) Including Mega Cab (Part #96424) |
2009-08-20
Needed muffler and tail pipe which was not available aftermarket. Dodge dealer wanted $547.00 for stock parts. Decided if I was going to have to spend that kind of money why not improve entire exhaust. Talked to a lot of people and spent 3 hours on internet before deciding on a Banks Monster stainless exhaust. I was concerned it might be too loud but ordered it anyway. WOW!!! Talk about QUALITY!! Sounds good but not too loud. I have decided any other improvements will be Banks products. You have earned a lifelong customer due to engineering and testing. THANK YOU!
P.S. Patiently waiting for air filter restriction indicator to tell me to call my new friends at BANKS!!
-David P.
Stilesville, IN
Banks Monster exhaust installed on a 2006 Dodge Cummins 5.9L. Single tip.
“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)