We are experiencing product shortages and longer than expected lead times on many items. Please email us with questions. Thank you for your patience and support.
We are experiencing product shortages and longer than expected lead times on many items. Please email us with questions. Thank you for your patience and support.
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  • Home
  • Duramax
    • Duramax 2001-2004 LB7
      • EFI Live Custom Tuning
      • Intakes
      • Exhaust System
      • Fuel System
      • Engine Components
      • Turbochargers
      • Electronics/Monitors
      • Steering & Suspension Components
      • Suspension
      • Towing
      • Transmission
      • Exterior Accessories
    • Duramax 2004.5-2005 LLY
      • EFI Live Custom Tuning
      • Intakes
      • Exhaust System
      • Fuel System
      • Engine Components
      • Turbochargers
      • Electronics/Monitors
      • Steering & Suspension Components
      • Suspension
      • Towing
      • Transmission
      • Exterior Accessories
      • Cooling System
    • Duramax 2006-2007 LBZ
      • EFI Live Custom Tuning
      • Intakes
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    • Duramax 2007.5-2010 LMM
      • EFI Live Custom Tuning
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      • Turbochargers
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    • Duramax 2011-2014 LML
      • EZ LYNK Custom Tuning
      • EFI Live Custom Tuning
      • Modules/Tuners
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      • Engine Components
      • Turbochargers
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      • Steering & Suspension Components
      • Suspension
      • Towing
      • Transmission
      • Exterior Accessories
    • Duramax 2015-2016 LML
      • EZ LYNK Custom Tuning
      • EFI Live Custom Tuning
      • Modules/Tuners
      • Intakes
      • Cooling System
      • Exhaust System
      • Fuel System
      • Engine Components
      • Turbochargers
      • Electronics/Monitors
      • Steering & Suspension Components
      • Suspension
      • Towing
      • Transmission
      • Exterior Accessories
    • Duramax 2017-2019 L5P
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      • Fuel System
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      • Cooling System
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      • Electronics/Monitors
      • Engine Components
      • Transmission
      • Steering & Suspension Components
      • Suspension
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      • Exterior Accessories
    • Duramax 2020-2021 L5P
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      • Interior Accessories
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  • Cummins
    • 2005-2007 5.9L Cummins
      • EFI Live Custom Tuning
      • Fuel System
      • Electronics/Monitors
      • Towing
    • 2007.5-2009 6.7L Cummins
      • EFI Live Custom Tuning
      • Fuel System
      • Electronics/Monitors
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    • 2010-2012 6.7L Cummins
      • EFI Live Custom Tuning
      • Fuel System
      • Electronics/Monitors
      • Towing
    • 2013-2018 6.7L Cummins
      • EZ LYNK Custom Tuning
      • Fuel System
      • Electronics/Monitors
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  • Powerstroke
    • 1999-2003 7.3L Powerstroke
      • Electronics/Monitors
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    • 2003-2007 6.0L Powerstroke
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    • 2008-2010 6.4L Powerstroke
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    • 2011-2018 6.7L Powerstroke
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Home Intakes 2004.5-2005 LLY

Intakes

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WCFAB Air Filter 4" Inlet (Dry)
WCFAB Air Filter 4" Inlet (Dry)
Sale
from $63.05

WCFAB Air Filter 4" Inlet (Dry)

WCFAB

Replacement Dry Air Filter used in WCFab 4" Intake kits and S300 Single Install Kits.

WCFAB 2004.5-2010 LLY/LBZ/LMM Duramax Driver Side 3" Intercooler Pipe
Sale
from $266.75

WCFAB 2004.5-2010 LLY/LBZ/LMM Duramax Driver Side 3" Intercooler Pipe

WCFAB

Powdercoat colors can be found here! LLY, LBZ, LMM Duramax One Piece High Flow 3" Driver Side Intercooler pipe. Replaces the 2 1/2" OEM inter ...

View full details
WCFAB 2004.5-2005 LLY Duramax Y-Bridge Kit
WCFAB 2004.5-2005 LLY Duramax Y-Bridge Kit
Sale
from $716.83

WCFAB 2004.5-2005 LLY Duramax Y-Bridge Kit

WCFAB

Powdercoat colors can be found here! The LLY 3" Y-Bridge Kit is an upgraded high flow intake kit for the 2004.5-2005 Duramax. The factory Y-br...

View full details
WCFAB 2004.5-2005 LLY Duramax 4" Intake Kit
WCFAB 2004.5-2005 LLY Duramax 4" Intake Kit
Sale
from $387.03

WCFAB 2004.5-2005 LLY Duramax 4" Intake Kit

WCFAB

Powdercoat colors can be found here! 2004.5-2005 LLY Duramax 4" high flow intake kit for factory turbo. This Intake is for use with a FACTOR...

View full details
WCFAB Outerwears Air Filter Cover
Sale
$39.95
$38.75

WCFAB Outerwears Air Filter Cover

WCFAB

Outerwears Air Filter Cover for all WCFab air filters used in our turbo kits and intake kits.

WCFAB 2004.5-2005 LLY 4" Intake Kit Stage 2
WCFAB 2004.5-2005 LLY 4" Intake Kit Stage 2
Sale
from $542.23

WCFAB 2004.5-2005 LLY 4" Intake Kit Stage 2

WCFAB

Powdercoat colors can be found here! 2004.5-2005 LLY Duramax 4" high flow Intake Kit and 3 1/2" Intake Horn for factory turbo. Must be used in...

View full details
WCFAB 2004.5-2005 LLY Duramax High Flow Intake Bundle Kit
WCFAB 2004.5-2005 LLY Duramax High Flow Intake Bundle Kit
Sale
from $1,677.13

WCFAB 2004.5-2005 LLY Duramax High Flow Intake Bundle Kit

WCFAB

Powdercoat colors can be found here!  High Flow Intake Bundle Package for 2004.5-2005 LLY Duramax. Saves ~$60.00 vs buying all components ind...

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Like many online stores, your item may drop-ship via a distributor. Shipping speeds are subject to change & the shipping service you choose may not be the same service your item ships via. We will try to take shipping speeds into consideration. Certain items, such as custom powder-coated products, carry a lead time. If you need something quickly. Please email us at sales@underdog-diesel.com

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