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
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.