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Down Pipes Down Pipes Learn More
3" Y-Bridge Kits 3" Y-Bridge Kits Learn More
4" Intake Kits 4" Intake Kits Learn More
Intercooler Pipes Intercooler Pipes Learn More
Single Turbo Kits Single Turbo 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 Chevrolet Silverado 2500/3500HD Lower Valance Filler Panel with Tow Hook Cutouts
Price: $209.00
2015-2019 GM 2500/3500HD Truck 3/4 in. Front Bumper Spacer Kit
Price: $229.00
2017-2019 L5P Duramax S400 Single Turbo Install Kit
Price: $3,495.00
2020+ GM 2500/3500HD Truck 3/4 in. Front Bumper Spacer Kit
Price: $179.00
2020+ GMC 2500/3500HD Fender Flare Billet Marker Light Delete Kit, No Logo
Price: $299.00
2003-2007 5.9L Cummins High Flow Intake Bundle Kit
Price: $1,059.00
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
Fass Fuel System Relocation Bracket for 2017+L5P Duramax
Price: $59.00
1999-2019 GM 1500/2500/3500 Billet Aluminum Brake Master Cylinder Cap, Black Anodized
Price: $35.00
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
2015-2019 Chevrolet Silverado 2500/3500HD Lower Valance Filler Panel without Tow Hook Cutouts
Price: $209.00
2017+ L5P Duramax Billet Black Anodized Turbo Resonator Plug
Price: $27.00
2017+ L5P Duramax CP3 Conversion Kit
Price: $2,295.00
Honda Talon Red (-TNR)
2019+ Honda Talon X/R Front Bumper without Fair Lead Mount
Price: $529.00
2020+ Duramax 60" Traction Bar Kit (RCLB/CCSB/DCSB)
Price: $859.00
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 - 3" Performance Leveling Kit
Price: $1,169.95
2020+ L5P Duramax Upper Coolant Pipe Kit
Price: $149.00
Billet Aluminum Coolant Tank Cap, Clear Anodized
Price: $36.95
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
Exergy Performance Summer Diesel Fuel Additive
Price: $6.00
Exergy Performance Winter Diesel Fuel Additive
Price: $5.00
Men's Pullover Flag Hoodie 
Price: $40.00
WCFab X FUEL Black Crew Socks
Price: $13.00

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.