Exhaust Kits | 2004.5-2005 GM 6.6 Duramax LLY

The 2004.5-05 6.6L LLY GM Duramax's came factory equipped with a 3.5" turbo back aluminized exhaust with a catalytic converter and muffler. While this system is reasonably adequate for stock to mildly ... read more

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MBRP Armor Lite 4" Exhaust-Single Outlet-Cat Back 01-05 GM 6.6L Duramax LB7 / LLY MBRP-S6000AL 65.50

MBRP Exhaust S6000AL

MBRP Armor Lite 4" Exhaust-Single Outlet-Cat Back 01-05 GM 6.6L Duramax LB7 / LLY $ 446.24 2050-01-01

Diesel Power Products now sells MBRP Armor Lite 4" Exhaust-Single Outlet-Cat Back for 01-05 6.6L GM Duramax LB7 / LLY S6000304 / 409 / AL Diamond Eye 4" Aluminized Cat-Back Single 04.5-05 6.6L LLY Duramax K4110A DE-K4110A-Main 0.00

Diamond Eye Performance K4110A

Diamond Eye 4" Aluminized Cat-Back Single 04.5-05 6.6L LLY Duramax K4110A $ 379.82 2050-01-01

Diesel Power Products carries Diamond Eye 4" Aluminized Cat-Back Single for 04.5-05 6.6L LLY Duramax K4110A Diamond Eye 4" Stainless Steel Cat-Back Single Outlet Exhaust 04.5-05 6.6L LLY Duramax K4110S DE-K4110S-Main 0.00

Diamond Eye Performance K4110S

Diamond Eye 4" Stainless Steel Cat-Back Single Outlet Exhaust 04.5-05 6.6L LLY Duramax K4110S $ 464.23 2050-01-01

Diesel Power Products carries Diamond Eye 4" Stainless Steel Cat-Back Single 04.5-05 6.6L LLY Duramax K4110S MBRP 4" Aluminized Steel Exhaust Stack T-Pipe Bed Kit - Universal MBRP-UT2001 38.00

MBRP Exhaust UT2001

MBRP 4" Aluminized Steel Exhaust Stack T-Pipe Bed Kit - Universal $ 331.49 2050-01-01

If you are looking for that profound Big Rig look and sound that stacks produce, MBRP has exactly what you are looking for. This specific kit is their universal T-Pipe kit and is designed to allow you to hook up to your existing under bed exhaust and finish it off with a pair of 4" inlet exhaust stacks of your choice. Mel's Manufacturing 4" Cat Back Exhaust Kit With Muffler 01-07 GM 6.6L Duramax MEL-431108-main 0.00

Mel's Manufacturing 431108

Mel's Manufacturing 4" Cat Back Exhaust Kit With Muffler 01-07 GM 6.6L Duramax $ 440 2050-01-01

Mel's Manufacturing's cat back exhaust system is a great way to upgrade the look of your factory exhaust for the guys that want to keep the cat in place. Each kit comes with everything required for installation. Available in aluminized or stainless steel Mel's Manufacturing 4" Cat Back Exhaust Kit using OEM 4-Bolt Flange 01-05 GM 6.6L Duramax MEL-431110 85.00

Mel's Manufacturing 431110

Mel's Manufacturing 4" Cat Back Exhaust Kit using OEM 4-Bolt Flange 01-05 GM 6.6L Duramax $ 440 2050-01-01

Diesel Power Products offers Mel's Manufacturing 4" Cat Back With Muffler for 2001-2005 Duramax. MBRP Smokers 4" Single Stack Bed Kit MBRP-UT4001 18.00

MBRP Exhaust UT4001

MBRP Smokers 4" Single Stack Bed Kit $ 182.74 2050-01-01

Diesel Power Products carries the MBRP Single Stack Bed Kit - Universal UT4001 / UT3001 Banks Power Monster Exhaust 01-05 6.6L GM Duramax LB7 / LLY BAN-48632-main 0.00

Banks Power 48628

Banks Power Monster Exhaust 01-05 6.6L GM Duramax LB7 / LLY $ 529 2050-01-01

Diesel Power Products carries Banks Power Monster Exhaust 01-05 6.6L GM Duramax LB7|LLY Banks Power Monster Sport Exhaust 01-05 6.6L GM Duramax LB7|LLY BAN-48769-main 0.00

Banks Power 48769

Banks Power Monster Sport Exhaust 01-05 6.6L GM Duramax LB7|LLY $ 429 2050-01-01

Power Products carries Banks Power Monster Sport Exhaust 01-05 6.6L GM Duramax LB7|LLY AFE MACH Force XP 4" Stainless Cat Back Exhaust 2001-05 GM 6.6L Duramax AFE-49-44001-Main 77.00

AFE 49-44001

AFE MACH Force XP 4" Stainless Cat Back Exhaust 2001-05 GM 6.6L Duramax $ 645 2050-01-01

The Mach Force XP Performance Cat-Back exhaust features 4" stainless steel tubing with smooth curves and increased size to help remove restriction and keeps exhaust gasses flowing smoothly. The OE style band-clamps and bayonnet style hangers make sure this system installs cleanly and easily. You will see increased performance and lower EGT's from this system. The Aluminized system does not come with a tip. MBRP Armor Lite Series Smokers 5" Single Stack Bed Kit MBRP-UT8001 24.00

MBRP Exhaust UT8001

MBRP Armor Lite Series Smokers 5" Single Stack Bed Kit $ 220.99 2050-01-01

Diesel Power Products carries the MBRP Smokers 5" Single Stack Bed Kit - Universal MBRP Armor Lite 4" Cat Back Aluminized Exhaust System with Muffler 01-05 GM 6.6L Duramax MBRP-S6000P 67.00

MBRP Exhaust S6000P

MBRP Armor Lite 4" Cat Back Aluminized Exhaust System with Muffler 01-05 GM 6.6L Duramax $ 356.99 2050-01-01

Upgrade the exhaust flow and sound of your Duramax with this simple to install kit from MBRP. Built from only the highest quality aluminized steel and including all of the necessary hangers and clamps, this cat back system will not only deliver the sound you want from your Chevy, but also the added performance, MPG's, and EGT reduction.

Description

The 2004.5-05 6.6L LLY GM Duramax's came factory equipped with a 3.5" turbo back aluminized exhaust with a catalytic converter and muffler. While this system is reasonably adequate for stock to mildly powered trucks, a larger diameter system or higher flow system from Diamond Eye, Magnaflow, MBRP, Mel's Manufacturing, AFE, Banks, or Silverline is mandatory on any Duramax equipped with even mild upgrades, or for those towing heavy loads. And of course, there are other benefits to adding an exhaust kit besides purely functional, aftermarket kits not only sound good, but they look even better, especially with a huge tip to finish it off.
We offer several different configurations for your new exhaust kit. We offer a cat back system, for those looking for a simple installation with great sound, as well as a turbo direct pipe back that eliminates the catalytic converter, considered an "off-road" kit. For those looking to also replace the factory flattened out turbo direct pipe, we offer several upgraded high flow turbo direct pipes that are sold separately from the kits. And for those looking for something even more unique, try out a set of exhaust stacks by MBRP. Imagine a set of 6" Bullhauler turnout stacks protruding from the bed of your truck! And you wouldn't believe the shuddering sound they produce, either!
You can either search by manufacturer by selecting one of the filters, or view our complete selection below. If you’re having trouble determining the best route for your exhaust system or components, feel free to give us a call or send an e-mail to [email protected] and we’d be happy to steer you in the right direction.

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