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Twin Turbo Kits Twin Turbo Kits Learn More
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Downpipes Downpipes Learn More
3" Y-Bridge Kits 3" Y-Bridge Kits Learn More
4" Intake Kits 4" Intake Kits Learn More
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Featured Products

2017-2019 L5P Duramax Passenger Side 3.5" Intercooler Pipe
Price: $269.00
2011-2016 LML Duramax Coolant Bypass Kit with Plug
Price: $79.95
2017+ L5P Duramax VGT Turbo Heat Blanket
Price: $139.00
2017-2019 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 2001-2010 Crew Cab Duramax
Price: $89.00
Men's T-Shirt- Flag Logo Black
Price: $20.00
Snap Back Hat Red/White/Blue WCFab 
Price: $25.00
WCFab Grey (Kingsport Grey)
2001-2004 LB7 Driver Side 3" Intercooler Pipe
Price: $269.00
2001-2010 Duramax 60" Traction Bar Kit (RCLB/CCSB/ECSB)
Price: $809.00
WCFab Grey (Kingsport Grey)
2004.5-2010 LLY/LBZ/LMM Driver Side 3" Intercooler Pipe
Price: $269.00
WCFab Red
2017-2019 L5P Duramax 3 1/2" Turbo Intake Horn with PCV Port
Price: $219.00

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.