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  1. Home
  2. GM Duramax
  3. 2004.5-2005 GM Duramax 6.6L LLY
  4. Exhaust Kits
  5. Exhaust Manifolds

2004.5-2005 GM Duramax 6.6L LLY Exhaust Manifolds

The stock exhaust manifold on your 2004.5-2005 GM 6.6L Duramax funnels exhaust gases from each cylinder and routes them to your truck's catalytic converter, ensuring consistent and reliable performance of your engine and it's components. When the OEM manifold starts to wear, the engine valves will slowly but surely become damaged, leaving you with additional hassles down the road. In order to prevent this from happening, we recommend investing in one of the premium exhaust manifolds we offer here at Alligator Performance! These turbo manifolds are premium replacements of your stock assembly so you can unlock the full potential out of your Sierra/Silverado 2500/3500HD. GM Duramax Fitments: 2004, 2005 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.

GM Duramax>2004.5-2005 6.6L LLY

Products [9]

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Item In Cart 04-05 GM 6.6L Duramax 2500HD / 3500HD LLY S&B Turbo Inlet Manifold
04-05 GM 6.6L Duramax 2500HD / 3500HD LLY S&B Turbo Inlet Manifold
In Stock. Ships in 1 Business Day!
$195.00
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Item In Cart 01-10 GM Duramax 6.6L BD Exhaust Manifold
01-10 GM Duramax 6.6L BD Exhaust Manifold
- Ships from Manufacturer in 1-2 Business Days
$190.95
View Details
Item In Cart 01-20 GM 6.6L Duramax 2500HD / 3500HD  PPE Turbo Coolant Hose (12.7mm)
01-20 GM 6.6L Duramax 2500HD / 3500HD PPE Turbo Coolant Hose (12.7mm)
In Stock. Ships in 1 Business Day!
$8.99
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Item In Cart 01-20 GM 6.6L Duramax 2500HD / 3500HD  PPE Turbo Coolant Hose (10mm)
01-20 GM 6.6L Duramax 2500HD / 3500HD PPE Turbo Coolant Hose (10mm)
In Stock. Ships in 1 Business Day!
$8.99
View Details
Item In Cart 01-16 GM 6.6L Duramax 2500HD / 3500HD  Bolt Set for PPE Manifolds M10-1.50x35 116110100
01-16 GM 6.6L Duramax 2500HD / 3500HD Bolt Set for PPE Manifolds M10-1.50x35 116110100
In Stock. Ships in 1 Business Day!
$17.99
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Item In Cart PPE 116111400 Exhaust Manifolds & Up-Pipes | 04.5-05 GM 6.6L Duramax 2500HD / 3500HD
PPE 116111400 Exhaust Manifolds & Up-Pipes | 04.5-05 GM 6.6L Duramax 2500HD / 3500HD
In Stock. Ships in 1 Business Day!
$1,121.99
View Details
Item In Cart 2001-16 GM 6.6L Duramax 2500HD / 3500HD PPE 118062010 Manifold Standard Port Gaskets
2001-16 GM 6.6L Duramax 2500HD / 3500HD PPE 118062010 Manifold Standard Port Gaskets
In Stock. Ships in 1 Business Day!
(1)
$19.79
View Details
Item In Cart 01-16 GM 6.6L Duramax 2500HD / 3500HD  PPE Manifold Oversize Port Gaskets
01-16 GM 6.6L Duramax 2500HD / 3500HD PPE Manifold Oversize Port Gaskets
In Stock. Ships in 1 Business Day!
$19.79
View Details
Item In Cart 01-16 GM 6.6L Duramax 2500HD / 3500HD  Merchant Exhaust Manifold Gasket
01-16 GM 6.6L Duramax 2500HD / 3500HD Merchant Exhaust Manifold Gasket
In Stock. Ships in 1 Business Day!
$38.00
View Details
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  • GM Duramax
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    • 2017-2019 GM Duramax 6.6L L5P
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  • Ford Powerstroke
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Categories

  • Duramax
    • 2020-2022 Duramax L5P
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2017-2019 Duramax L5P
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2011-2016 Duramax LML
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2007.5-2010 Duramax LMM
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2006-2007 Duramax LBZ
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2004.5-2005 Duramax LLY
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2001-2004 Duramax LB7
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
  • Powerstroke
    • 2020-2022 6.7L Powerstroke
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2017-2019 6.7L Powerstroke
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2011-2016 6.7L Powerstroke
      • Engine Upgrades
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      • Tonneau Covers
      • Exterior
      • View More
    • 2008-2010 6.4L Powerstroke
      • Engine Upgrades
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    • 2003-2007 6.0L Powerstroke
      • Engine Upgrades
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  • Cummins
    • 2019-2022 6.7L Cummins
      • Engine Upgrades
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    • 2013-2018 6.7L Cummins
      • Engine Upgrades
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    • 2010-2012 6.7L Cummins
      • Engine Upgrades
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      • Exterior
      • View More
    • 2007.5-2009 6.7L Cummins
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2004.5-2007 5.9L Cummins
      • Engine Upgrades
      • Exhaust Kits
      • Leveling Kits
      • Lift Kits
      • Tonneau Covers
      • Exterior
      • View More
    • 2003-2004 5.9L Cummins
      • Engine Upgrades
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      • View More

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