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2004.5-05 6.6L LLY GM Duramax Exhaust Kits

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

Grand Rock Build Your Own Cab Back Complete Dual Stack Kit GR-DPU-4SK-Main 0.00 Grand Rock Build Your Own Cab Back Complete Dual Stack Kit Grand Rock DPU-4SK Get everything you need to install a Grand Rock Dual Stack kit onto your truck! Grand Rock Dual 5" Stack Bed Kit GR-DPU-5SK-main 0.00 Grand Rock Dual 5" Stack Bed Kit Grand Rock DPU-5SK
$ 414.62 2050-01-01
Power Products carries the Grand Rock Dual 5" Stack Bed Kit
Grand Rock Dual 6" Stack Bed Kit GR-DPU-6SK-main 0.00 Grand Rock Dual 6" Stack Bed Kit Grand Rock DPU-6SK
$ 438.35 2050-01-01
Power Products carries the Grand Rock Dual 6" Stack Bed Kit
Grand Rock Dual 7" Stack Bed Kit GR-DPU-7SK-main 0.00 Grand Rock Dual 7" Stack Bed Kit Grand Rock DPU-7SK
$ 462.08 2050-01-01
Power Products carries the Grand Rock Dual 7" Stack Bed Kit
Grand Rock Build Your Own Cab Back Complete Single Stack Kit GR-SPU-4SK-Main 0.00 Grand Rock Build Your Own Cab Back Complete Single Stack Kit Grand Rock SPU-4SK Get everything you need to install a Grand Rock Single Stack kit onto your truck! Grand Rock Single 5" Stack Bed Kit GR-SPU-5SK-main 0.00 Grand Rock Single 5" Stack Bed Kit Grand Rock SPU-5SK Power Products carries the Grand Rock Single 5" Stack Bed Kit Grand Rock Single 6" Stack Bed Kit GR-SPU-6SK-main 0.00 Grand Rock Single 6" Stack Bed Kit Grand Rock SPU-6SK Power Products carries the Grand Rock Single 6" Stack Bed Kit MBRP 4" Exhaust-Single Outlet-Cat Back 01-05 6.6L GM Duramax LB7 / LLY MBRP-S6000AL-M 0.00 MBRP 4" Exhaust-Single Outlet-Cat Back 01-05 6.6L GM Duramax LB7 / LLY MBRP Exhaust S6000AL Diesel Power Products now sells MBRP 4" Exhaust-Single Outlet-Cat Back for 01-05 6.6L GM Duramax LB7 / LLY S6000304 / 409 / AL MBRP S60220AL 5" Cat Back Single Outlet Aluminized Exhaust 01-05 6.6L GM Duramax LB7 / LLY MBRP-S60220AL 80.00 MBRP S60220AL 5" Cat Back Single Outlet Aluminized Exhaust 01-05 6.6L GM Duramax LB7 / LLY MBRP Exhaust S60220AL Diesel Power Products now sells MBRP 5" Exhaust-Single Outlet-Cat Back for 01-05 6.6L GM Duramax LB7 / LLY S6022AL Magnaflow 16930 4" Cat-Back Single Outlet Exhaust 01-05 6.6L LB7/LLY GM Duramax Crew Cab, Long Bed MF-16930 65.00 Magnaflow 16930 4" Cat-Back Single Outlet Exhaust 01-05 6.6L LB7/LLY GM Duramax Crew Cab, Long Bed MagnaFlow Exhaust 16930 Diesel Power Products carries the Magnaflow 4" Cat-Back Single Outlet Exhaust for 01-05 6.6L LB7 / LLY GM Duramax Crew Cab, Long Bed 17931 / 16931 / 16930 Silverline Eliminator Pipe (Dual Outlet) 94-02 5.9L Dodge Cummins / 01-07 6.6L GM Duramax DMPDM SLV-DMPDM 25.00 Silverline Eliminator Pipe (Dual Outlet) 94-02 5.9L Dodge Cummins / 01-07 6.6L GM Duramax DMPDM Silverline Exhaust DMPDM Diesel Power Products now sells Silverline Eliminator Pipe (DUAL OUTLET) 94-02 5.9L Dodge Cummins / 01-07 6.6L GM Duramax DMPDM Silverline Muffler Eliminator Pipe 99-07 Ford Powerstroke / 01-07 6.6L GM Duramax SLV-DMPSS 25.00 Silverline Muffler Eliminator Pipe 99-07 Ford Powerstroke / 01-07 6.6L GM Duramax Silverline Exhaust DMPSS Diesel Power Products now sells Silverline Eliminator Pipe 99-07 7.3L / 6.0L Ford Powerstroke / 01-07 6.6L GM Duramax LB7 / LLY / LBZ DMPSS

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, FLO~PRO, Magnaflow, MBRP, 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 Grand Rock. 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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