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4" Intake Kits 4" Intake Kits Learn More
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Featured Products

WCFAB Red
2017-2019 L5P Duramax 4" Intake Kit with Air Box
Price: $539.00
2015-2019 LML/L5P Duramax Chevrolet Silverado Bumper Grille
Price: $119.00
2017-2019 L5P Duramax S300 Single Turbo Install Kit
Price: $2,995.00
2017-2019 L5P Duramax S400 Single Turbo Install Kit
Price: $3,495.00
2003-2007 5.9L Cummins High Flow Intake Bundle Kit
Price: $1,059.00
2011-2019 LML/L5P Duramax Allison 4x4 Transfer Case Brace
Price: $149.00
WCFab Red
2017-2019 L5P Duramax OEM Placement Coolant Tank Kit
Price: $449.00
2017-2019 L5P Duramax Passenger Side 3.5" Intercooler Pipe
Price: $279.00
2017-2019 L5P Duramax Transmission Cooler Thermostat Bypass Plug
Price: $55.00
2020+ L5P Duramax 3.5" Passenger (Cold) Side Intercooler Pipe Kit
Price: $339.00
2020+ L5P Duramax OEM Placement Coolant Tank Kit
Price: $489.00
Edge Insight CTS3 Gauge Monitor
Price: $399.95
2017-2020 L5P Duramax New Exergy Injectors 100%
Price: $3,876.40
Fass Fuel System Relocation Bracket for 2011-2016 Crew Cab Duramax
Price: $99.00
Fass Fuel System Relocation Bracket for 2017+L5P Duramax
Price: $59.00
Fass Titanium Signature Series 165 GPH Lift Pump for 2015-2016 Duramax
Price: $778.05
1999-2019 GM 1500/2500/3500 Billet Aluminum Brake Master Cylinder Cap, Black Anodized
Price: $35.00
2001-2010 Duramax 60" Traction Bar Kit (RCLB/CCSB/ECSB)
Price: $859.00
2001-2019 Duramax Brake Master Cylinder Reservoir Cover
Price: $129.00
2003-2009 Cummins Upper Coolant Pipe
Price: $139.00
2010-2018 6.7L Cummins Upper Coolant Pipe
Price: $139.00
2013-2018 6.7 Cummins OEM Placement Coolant Tank Kit 
Price: $459.00
2020+ L5P Duramax 3" Driver (Hot) Side Intercooler Pipe Kit
Price: $299.00
2020+ L5P Duramax 3.5" Turbo Intake Horn
Price: $219.00
2020+ L5P Duramax 4" Intake Resonator Pipe
Price: $199.00
2020+ L5P Duramax Cognito - Stage 2 Leveling Package
Price: $1,169.95
2020+ L5P Duramax Upper Coolant Pipe Kit
Price: $149.00
Chemical Guys Bare Bones Undercarriage Spray, 16 fl oz
Price: $9.99
Chemical Guys Hybrid V07 Optical Select High-Gloss Spray Sealant & Quick Detailer, 16 fl oz
Price: $17.99
Chemical Guys Meticulous Matte Detailer and Spray Sealant, 16 fl oz
Price: $9.99

Welcome to Wehrli Custom Fabrication Inc.

Thanks to our satisfied growing customer base of diesel enthusiasts like yourself, Wehrli Custom Fabrication has continued to make a distinct footprint in the ever-growing, competitive, diesel performance industry. Leading the way in product development and new idea’s for several years, we continue to strive and excel in offering the latest and greatest products for your diesel truck. Whether you use your diesel truck for work, play, performance, or racing, you can trust US to exceed YOUR expectations.

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Wehrli Custom Fabrication Inc.