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UnderDog Diesel

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Engine & Performance

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Wehrli Custom Fabrication 2003-2007 5.9L Cummins 3.5" High Flow Intake Horn & Intercooler Pipe Kit - WCF100528

Engine & Performance

Wehrli Custom Fabrication 2003-2007 5.9L Cummins 3.5" High Flow Intake Horn & Intercooler Pipe Kit - WCF100528

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Wehrli Custom Fabrication 2003-2007 5.9L Cummins 3" Driver (Cold) Side Replacement Intercooler Pipe - WCF100359

Engine & Performance

Wehrli Custom Fabrication 2003-2007 5.9L Cummins 3" Driver (Cold) Side Replacement Intercooler Pipe - WCF100359

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Wehrli Custom Fabrication 2003-2007 5.9L Cummins 3" Passenger (Hot) Side Replacement Intercooler Pipe Kit - WCF100544

Engine & Performance

Wehrli Custom Fabrication 2003-2007 5.9L Cummins 3" Passenger (Hot) Side Replacement Intercooler Pipe Kit - WCF100544

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Wehrli Custom Fabrication 2003-2007 5.9L Cummins S400/S300 Side by Side Compound (Twin) Turbo Kit - WCF100864

Engine & Performance

Wehrli Custom Fabrication 2003-2007 5.9L Cummins S400/S300 Side by Side Compound (Twin) Turbo Kit - WCF100864

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Wehrli Custom Fabrication 2003-2007 5.9L Cummins S400/S400 Side by Side Compound (Twin) Turbo Kit - WCF100580

Engine & Performance

Wehrli Custom Fabrication 2003-2007 5.9L Cummins S400/S400 Side by Side Compound (Twin) Turbo Kit - WCF100580

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Wehrli Custom Fabrication 2003-2007 5.9L Cummins S400/Stock Twin Turbo Kit - WCF100567

Engine & Performance

Wehrli Custom Fabrication 2003-2007 5.9L Cummins S400/Stock Twin Turbo Kit - WCF100567

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Wehrli Custom Fabrication 2003-2007 5.9L Cummins Stage 1 High Flow Intake Bundle Kit - WCF100329

Engine & Performance

Wehrli Custom Fabrication 2003-2007 5.9L Cummins Stage 1 High Flow Intake Bundle Kit - WCF100329

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Wehrli Custom Fabrication 2003-2007 5.9L Cummins Steel IAT Sensor Bung - WCF205-29

Engine & Performance

Wehrli Custom Fabrication 2003-2007 5.9L Cummins Steel IAT Sensor Bung - WCF205-29

$35.89

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Wehrli Custom Fabrication 2003-2009 Cummins Upper Coolant Pipe - WCF100678

Engine & Performance

Wehrli Custom Fabrication 2003-2009 Cummins Upper Coolant Pipe - WCF100678

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Wehrli Custom Fabrication 2004.5-2005 LLY 4" Stage 2 Intake Kit - WCF100637

Engine & Performance

Wehrli Custom Fabrication 2004.5-2005 LLY 4" Stage 2 Intake Kit - WCF100637

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Wehrli Custom Fabrication 2004.5-2007 5.9L Cummins OEM Placement Coolant Tank Kit - WCF100542

Engine & Performance

Wehrli Custom Fabrication 2004.5-2007 5.9L Cummins OEM Placement Coolant Tank Kit - WCF100542

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Wehrli Custom Fabrication 2004.5-2007 5.9L Cummins S300 High Mount 2nd Gen Swap Kit - WCF100475

Engine & Performance

Wehrli Custom Fabrication 2004.5-2007 5.9L Cummins S300 High Mount 2nd Gen Swap Kit - WCF100475

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Wehrli Custom Fabrication 2004.5-2007 5.9L Cummins S400 High Mount 2nd Gen Swap Kit - WCF100486

Engine & Performance

Wehrli Custom Fabrication 2004.5-2007 5.9L Cummins S400 High Mount 2nd Gen Swap Kit - WCF100486

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Wehrli Custom Fabrication 2004.5-2010 LLY/LBZ/LMM Duramax 3" Down Pipe  - WCF100120

Engine & Performance

Wehrli Custom Fabrication 2004.5-2010 LLY/LBZ/LMM Duramax 3" Down Pipe  - WCF100120

$194.00

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Wehrli Custom Fabrication 2004.5-2010 LLY/LBZ/LMM Duramax Billet Crankcase Vent (PCV) Fitting Kit, Black Anodized - WCF100189

Engine & Performance

Wehrli Custom Fabrication 2004.5-2010 LLY/LBZ/LMM Duramax Billet Crankcase Vent (PCV) Fitting Kit, Black Anodized - WCF100189

$46.08

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Wehrli Custom Fabrication 2006-2007 LBZ Duramax Stage 1 High Flow Intake Bundle Kit - WCF100323

Engine & Performance

Wehrli Custom Fabrication 2006-2007 LBZ Duramax Stage 1 High Flow Intake Bundle Kit - WCF100323

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Wehrli Custom Fabrication 2006-2007 LBZ Duramax Stage 2 High Flow Intake Bundle Kit - WCF100437

Engine & Performance

Wehrli Custom Fabrication 2006-2007 LBZ Duramax Stage 2 High Flow Intake Bundle Kit - WCF100437

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Wehrli Custom Fabrication 2006-2007 LBZ Duramax Stage 3 High Flow Intake Bundle Kit - WCF100503

Engine & Performance

Wehrli Custom Fabrication 2006-2007 LBZ Duramax Stage 3 High Flow Intake Bundle Kit - WCF100503

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Wehrli Custom Fabrication 2006-2010 LBZ/LMM Duramax Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for DUAL CP3 - WCF100424

Engine & Performance

Wehrli Custom Fabrication 2006-2010 LBZ/LMM Duramax Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for DUAL CP3 - WCF100424

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Wehrli Custom Fabrication 2006-2023 5.9L and 6.7L Cummins WCFab X D&J Precision Billet Valve Cover - WCF100366

Engine & Performance

Wehrli Custom Fabrication 2006-2023 5.9L and 6.7L Cummins WCFab X D&J Precision Billet Valve Cover - WCF100366

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Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Coolant Bypass/Relocation Fitting - WCF100798

Engine & Performance

Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Coolant Bypass/Relocation Fitting - WCF100798

$40.74

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Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Stage 1 High Flow Intake Bundle Kit - WCF100324

Engine & Performance

Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Stage 1 High Flow Intake Bundle Kit - WCF100324

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Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Stage 2 High Flow Intake Bundle Kit - WCF100438

Engine & Performance

Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Stage 2 High Flow Intake Bundle Kit - WCF100438

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Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Stage 3 High Flow Intake Bundle Kit - WCF100504

Engine & Performance

Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Stage 3 High Flow Intake Bundle Kit - WCF100504

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Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Twin Turbo Coolant Tank Kit - WCF100643

Engine & Performance

Wehrli Custom Fabrication 2007.5-2010 LMM Duramax Twin Turbo Coolant Tank Kit - WCF100643

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Wehrli Custom Fabrication 2010-2012 6.7 Cummins Radiator/Core Support Cover - WCF100539

Engine & Performance

Wehrli Custom Fabrication 2010-2012 6.7 Cummins Radiator/Core Support Cover - WCF100539

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Wehrli Custom Fabrication 2010-2012 6.7L Cummins 4" Intake Kit with Air Box - WCF100875

Engine & Performance

Wehrli Custom Fabrication 2010-2012 6.7L Cummins 4" Intake Kit with Air Box - WCF100875

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Wehrli Custom Fabrication 2010-2012 6.7L Cummins Heater Core to Water Pump Hose Assembly - WCF100266

Engine & Performance

Wehrli Custom Fabrication 2010-2012 6.7L Cummins Heater Core to Water Pump Hose Assembly - WCF100266

$47.53

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Wehrli Custom Fabrication 2010-2012 6.7L Cummins OEM Placement Coolant Tank Kit  - WCF100212

Engine & Performance

Wehrli Custom Fabrication 2010-2012 6.7L Cummins OEM Placement Coolant Tank Kit  - WCF100212

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Wehrli Custom Fabrication 2010-2024 6.7L Cummins Engine Cover - WCF100730

Engine & Performance

Wehrli Custom Fabrication 2010-2024 6.7L Cummins Engine Cover - WCF100730

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Wehrli Custom Fabrication 2011-2015 LML Duramax Stage 3 High Flow Intake Bundle Kit - WCF100505

Engine & Performance

Wehrli Custom Fabrication 2011-2015 LML Duramax Stage 3 High Flow Intake Bundle Kit - WCF100505

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Wehrli Custom Fabrication 2011-2016 Duramax / 2013-2018 Cummins Low Coolant Level Sensor  - WCF206-25

Engine & Performance

Wehrli Custom Fabrication 2011-2016 Duramax / 2013-2018 Cummins Low Coolant Level Sensor  - WCF206-25

$49.47

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Wehrli Custom Fabrication 2011-2016 Duramax Thermostat Housing - WCF100176

Engine & Performance

Wehrli Custom Fabrication 2011-2016 Duramax Thermostat Housing - WCF100176

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Wehrli Custom Fabrication 2011-2016 LML Duramax 2" Stainless Passenger Side Up Pipe Kit for OEM or WCFab Manifolds w/ Gaskets - WCF100211

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax 2" Stainless Passenger Side Up Pipe Kit for OEM or WCFab Manifolds w/ Gaskets - WCF100211

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Wehrli Custom Fabrication 2011-2016 LML Duramax 2" Stainless Up Pipe Kit for OEM or WCFab Manifolds w/ Gaskets - WCF100197

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax 2" Stainless Up Pipe Kit for OEM or WCFab Manifolds w/ Gaskets - WCF100197

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Wehrli Custom Fabrication 2011-2016 LML Duramax 4" Intake Kit with Air Box Stage 2 - WCF100304

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax 4" Intake Kit with Air Box Stage 2 - WCF100304

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Wehrli Custom Fabrication 2011-2016 LML Duramax CP3 Conversion Kit - WCF100260

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax CP3 Conversion Kit - WCF100260

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Wehrli Custom Fabrication 2011-2016 LML Duramax HD Engine Mounts - WCF100160

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax HD Engine Mounts - WCF100160

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Wehrli Custom Fabrication 2011-2016 LML Duramax High Flow Intercooler Pipe Kit - WCF100409

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax High Flow Intercooler Pipe Kit - WCF100409

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Wehrli Custom Fabrication 2011-2016 LML Duramax High Flow Turbo Intake Horn - WCF100417

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax High Flow Turbo Intake Horn - WCF100417

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Wehrli Custom Fabrication 2011-2016 LML Duramax Stage 1 High Flow Intake Bundle Kit - WCF100278

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax Stage 1 High Flow Intake Bundle Kit - WCF100278

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Wehrli Custom Fabrication 2011-2016 LML Duramax Stage 2 High Flow Intake Bundle Kit - WCF100439

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax Stage 2 High Flow Intake Bundle Kit - WCF100439

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Wehrli Custom Fabrication 2011-2016 LML Duramax Twin Turbo Coolant Tank Kit - WCF100644

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax Twin Turbo Coolant Tank Kit - WCF100644

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Wehrli Custom Fabrication 2011-2016 LML Duramax WCFab X PPE High-Capacity Cast Aluminum Engine Oil Pan - WCF100132

Engine & Performance

Wehrli Custom Fabrication 2011-2016 LML Duramax WCFab X PPE High-Capacity Cast Aluminum Engine Oil Pan - WCF100132

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Wehrli Custom Fabrication 2013-2015 6.7L Cummins Upper Coolant Pipe for Dual Radiator - WCF100867

Engine & Performance

Wehrli Custom Fabrication 2013-2015 6.7L Cummins Upper Coolant Pipe for Dual Radiator - WCF100867

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Wehrli Custom Fabrication 2013-2018 6.7 Cummins Radiator / Core Support Cover - WCF100546

Engine & Performance

Wehrli Custom Fabrication 2013-2018 6.7 Cummins Radiator / Core Support Cover - WCF100546

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Wehrli Custom Fabrication 2013-2018 6.7L Cummins 4" Intake Kit with Air Box - WCF100881

Engine & Performance

Wehrli Custom Fabrication 2013-2018 6.7L Cummins 4" Intake Kit with Air Box - WCF100881

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Wehrli Custom Fabrication 2013-2018 6.7L Cummins Driver Side 3.5" Intercooler Pipe Kit - WCF100434

Engine & Performance

Wehrli Custom Fabrication 2013-2018 6.7L Cummins Driver Side 3.5" Intercooler Pipe Kit - WCF100434

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