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Wehrli Custom Fabrication

Wehrli Custom Fabrication Inc. Specializes in High Performance Diesel and Custom Metal Fabrication.

Brand: Wehrli Custom Fabrication Part Number: WCF100190
LB7 Duramax 4" Intake Kit for factory turbo.Includes: 4" Intake Dry Air Filter Outerwear's Pre-Filter Cover Silicone Boot T-Bolt Clamps Powder Coating WCFAB part number: WCF100334 Wehrli Custom Powder Coating is housed under the same roof as Wehrli Custom Fabrication. This has Enabled ..
$484.03
Brand: Wehrli Custom Fabrication Part Number: WCF100300
LB7 Stage 2 Intake Kit with turbo inlet horn for factory turbo.Includes: 4" Intake 3-1/2" Intake Horn Outerwear's Pre-Filter Cover Air Filter Cover Silicone Boot T-Bolt Clamps Powder Coating WCFAB part number:WCF100636 Click here for Wehrli powder coat samples Wehrli Custom Powder Coa..
$571.33
Brand: Wehrli Custom Fabrication Part Number: WCF100712
High-Flow Intake Bundle Package for 2001-2004 LB7 Duramax. Save $50 By Buying through this Bundle! Includes: 3" Fabricated Y-Bridge 3" Cold Side Intercooler 3" Hot Side Intercooler Pipe 4" Intake 3-1/2" Intake Horn Dry Air Filter Outerwear's Pre-Filter Cover 3" Turbo Downpipe Silicone Bo..
$1,867.25
Brand: Wehrli Custom Fabrication Part Number: WCF100191
WCFab 4” Intake kits are designed to work with the factory turbocharger or upgraded “drop-in” style turbochargers. Using a high flow AFE dry type air filter for more air flow and better filtration over the factory unit this intake kit will provide more horsepower and torque. Available in many custom..
$484.03
Brand: Wehrli Custom Fabrication Part Number: WCF100301
WCFab 4” Stage 2 Intake kits are designed to work with the factory turbocharger or upgraded “drop-in” style turbochargers. Using a high flow AFE dry type air filter for more air flow and better filtration over the factory unit this intake kit will provide more horsepower and torque. Available in man..
$736.23
Brand: Wehrli Custom Fabrication Part Number: WCF100192
LBZ Duramax 4" Intake Kit for factory turbo.Includes: 4" Intake Dry Air Filter Outerwear's Pre-Filter Cover Silicone Boot T-Bolt Clamps Powder Coating WCFAB part number: WCF100336 Click here for Wehrli powder coat samples Wehrli Custom Powder Coating is housed under the same roof as W..
$484.03
Brand: Wehrli Custom Fabrication Part Number: WCF100302
LBZ Stage 2 Intake Kit with turbo inlet horn for factory turbo.Includes: 4" Intake 3-1/2" Intake Horn Dry Air Filter Outerwear's Pre-Filter Cover O-Ring Silicone Boot T-Bolt Clamps Powder Coating WCFAB part number: WCF100302Superseded WCFAB part number: WCF100638 Click here for ..
$736.23
Brand: Wehrli Custom Fabrication Part Number: WCF100193
LMM Duramax 4" Intake Kit for factory turbo.Includes: 4" Intake Dry Air Filter Outerwear's Pre-Filter Cover Silicone Boot T-Bolt Clamps Powder Coating WCFAB part number: WCF100635 Wehrli Custom Powder Coating is housed under the same roof as Wehrli Custom Fabrication. This has Enabled th..
$484.03
Brand: Wehrli Custom Fabrication Part Number: WCF100194
LML Duramax 4" Intake Kit for factory turbo.Includes: 4" Intake Dry Air Filter Outerwear's Pre-Filter Cover Boots & Clamps Powder Coating WCFAB part number: WCF100337 replaces part number WCF100338. Click here for Wehrli powder coat samples Wehrli Custom Powder Coating is housed un..
$484.03
Brand: Wehrli Custom Fabrication Part Number: WCF100395
Clean up the engine bay of your 1998.5-2023 Cummins with this Billet Aluminum Black Anodized Oil Fill Cap from WCFab. This is a complete cap, not a cover. Direct OEM replacement for the factory plastic part. Includes o-ring seal. CNC machined in the USA.***Not compatible with WCFab X D&J Billet ..
$57.23
Brand: Wehrli Custom Fabrication Part Number: WCF100394
Clean up the engine bay of your 1998.5-2023 Cummins with this Billet Aluminum Clear Anodized Oil Fill Cap from WCFab. This is a complete cap, not a cover. Direct OEM replacement for the factory plastic part. Includes o-ring seal. CNC machined in the USA.***Not compatible with WCFab X D&J Billet ..
$57.23
Brand: Wehrli Custom Fabrication Part Number: WCF100258
Clean up the engine bay of your 1998.5-2023 5.9L or 6.7L Cummins truck with this black anodized billet aluminum brake reservoir cap from WCFab. This is a complete cap, not a cover. CNC machined in the USA from billet aluminum.- CNC Machined Billet Cap is a direct OEM Replacement, not a cover- Made i..
$33.95
Brand: Wehrli Custom Fabrication Part Number: WCF100654
Replace the lightweight, leak-prone passenger side OEM up pipe with this heavy-duty 11 gauge 2" Stainless up pipe. HD Stainless Bellow that will not crack and leak like OEM. Increase Turbo spool up and decrease EGTs. This up pipe is built to clear a conventional downpipe behind the engine in single ..
$309.43
Brand: Wehrli Custom Fabrication Part Number: WCF100590
Replace the lightweight, leak-prone, 1 5/8" OEM up pipes with these heavy-duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGTs. This kit is for use with single turbo applications and factory exhaust manifolds.IN..
$577.15
Brand: Wehrli Custom Fabrication Part Number: WCF100265
2001-2010 LB7, LLY, LBZ, LMM Crew Cab Duramax Fass Fuel System Relocation Mounting Bracket. Relocates the FASS fuel system to underneath the truck on the inside of the driver side frame rail.**NOT COMPATIBLE on regular cab or extended cab models**-Mount Bracket-Grade 8 Hardware-Zinc primer & Sem..
$92.15
Brand: Wehrli Custom Fabrication Part Number: WCF100652
Replace the lightweight, leak-prone Driver side OEM up pipe with this heavy-duty 11 gauge 2" Stainless up pipe. HD Stainless Bellow that will not crack and leak like OEM. Increase Turbo spool up and decrease EGTs. Will work with ANY Turbo setup, single or compound, compatible with factory exhaust ma..
$309.43
Brand: Wehrli Custom Fabrication Part Number: WCF100363
WCFab’s 2001-2016 Duramax Billet Exhaust Manifolds replace the restrictive factory cast parts with high-strength, TIG-welded high-flow billet steel components designed to enhance exhaust flow characteristics, improving turbo spool up, lowering EGTs and increasing power and economy. These manifolds a..
$1,289.13
Brand: Wehrli Custom Fabrication Part Number: WCF100240
The WCFab 2001-2016 Duramax Up Pipe Bolt Kit is comprised of 6 specially selected high strength 12 point ARP fasteners and matched washers with a pack of assembly lube and are designed as an upgrade to the OEM fasteners employed on the 2001-2016 and newer 6.6L Duramax engines to connect the up pipes..
$33.95
Brand: Wehrli Custom Fabrication Part Number: WCF100113-X
Fits:  2001-2019 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P 2003-2009 Dodge 6.7L Cummins (With AA14-11.5 Axle) 2010-2018 Ram 6.7L (With AA14-11.5 Axle) This Wehrli Custom Fab WCF100113 11.5" AAM Rear Axle Differential Cover is the perfect component for your truck. This cover is bu..
$343.38
Brand: Wehrli Custom Fabrication Part Number: WCF100443
Clean up the engine bay of your 2001-2024 Duramax with this Billet Aluminum Black Anodized Oil Fill Cap from WCFab. This is a complete cap, not a cover. Direct OEM replacement for the factory plastic part. Includes o-ring seal and machined cam lock engagement. CNC machined in the USA.Direct replacem..
$49.47
Brand: Wehrli Custom Fabrication Part Number: WCF100442
Clean up the engine bay of your 2001-2024 Duramax with this Billet Aluminum Clear Anodized Oil Fill Cap from WCFab. This is a complete cap, not a cover. Direct OEM replacement for the factory plastic part. Includes o-ring seal and machined cam lock engagement. CNC machined in the USA.Direct replacem..
$49.47
Brand: Wehrli Custom Fabrication Part Number: WCF100333
2003-2007 Ford 6.0 Powerstroke 4" Intake Kit for factory turbo. Includes: 4" Intake Dry Air Filter Outerwear's Pre-Filter Cover Boots & Clamps Powder Coating WCFAB part number: WCF100333 Click here for Wehrli powder coat samples Wehrli Custom Powder Co..
$411.28
Brand: Wehrli Custom Fabrication Part Number: WCF100678
Aluminum Upper Coolant Pipe for 2003-2009 5.9L & 6.7L Cummins. Replaces the OEM rubber upper coolant hose and comes powder coated in your choice of colors! For use with OEM RAM radiator. Aftermarket radiators may cause fitment issues.***NOT COMPATIBLE WITH TRUCKS EQUIPPED WITH TWIN CP3 PUMPS***-..
$144.53
Brand: Wehrli Custom Fabrication Part Number: WCF100189
Replace the fragile plastic OEM fittings on the top of your 2004.5-2010 LLY/LBZ/LMM Duramax engine which are prone to damage with these high quality, black anodized, CNC machined billet aluminum fittings from WCFab. No tuning required.- Kit includes two CNC machined billet aluminum fittings with o-r..
$44.62
Brand: Wehrli Custom Fabrication Part Number: WCF100209
Clean up the engine bay of your 2004.5-2022 Dodge Ram 2500/3500 truck with this custom powder coated fabricated aluminum brake reservoir cover from WCFab that fits over the unsightly OEM plastic reservoir. Pair with a WCFab billet aluminum brake reservoir cap for the completed look.***NOTE: Some 200..
$144.53
Brand: Wehrli Custom Fabrication Part Number: WCF100323
Stage 1 upgrade for the 2006-2007 LBZ Duramax improves airflow between the turbo and engine for improved efficiency, throttle response, and turbo spool-up. Eliminates weak points in the factory design that can lead to boost leaks or complete failures in hard-working and high-performance applications..
$1,502.53
Brand: Wehrli Custom Fabrication Part Number: WCF100437
Stage 2 upgrade for the 2006-2007 LBZ Duramax combines our popular Stage 1 High Flow Bundle and Stage 2 intake Kit into a single package, providing increased airflow for your turbo and engine for improved efficiency, throttle response, and turbo spool up. Eliminates weak points in the factory design..
$2,226.15
Brand: Wehrli Custom Fabrication Part Number: WCF100622
Fits: 2006-2010 GM 6.6L Duramax LBZ/LMMWhen replacing the upper coolant  hose in your vehicle, consider replacing it with the Wehrli Custom Fab Upper Coolant Pipe. The WCFab coolant pipes are built with durable aluminum  and beaded-rolled ends. Simiar to many other WCFab parts,  this ..
$24.25
Brand: Wehrli Custom Fabrication Part Number: WCF100324
Stage 1 upgrade for the 2007.5-2010 LMM Duramax improves airflow between the turbo and engine for improved efficiency, throttle response, and turbo spool-up. Eliminates weak points in the factory design that can lead to boost leaks or complete failures in hard-working and high-performance applicatio..
$1,502.53
Brand: Wehrli Custom Fabrication Part Number: WCF100438
Stage 2 upgrade for the 2007.5-2010 LMM Duramax combines our popular Stage 1 High Flow Bundle and Stage 2 intake Kit into a single package providing increased airflow for your turbo and engine for improved efficiency, throttle response, and turbo spool up. Eliminates weak points in the factory desig..
$2,226.15
Brand: Wehrli Custom Fabrication Part Number: WCF100303
2007.5-2010 LMM Duramax 4" high flow Intake Kit and 3 1/2" Intake Horn for factory turbo. Must be Used in conjunction with WCFab 3" Y-bridge Kit. Includes: 4" Intake 3-1/2" Intake Horn Dry Air Filter Outerwear's Pre-Filter Cover O-Ring Silicone Boot T-Bolt Clamps Powder Coating WCF..
$736.23
Brand: Wehrli Custom Fabrication Part Number: WCF205-136
Fits: 2010-2012 Ram 6.7L CumminsCummins Thin Flange #10 JIC / -10 AN Male Fitting for Coolant Port Behind Waterpump. Press Fit Connection with High Temp O-Ring Seal and Mounting Bolt Tab.- #10 JIC / -10AN Male Fitting for Coolant Port Behind Water pump- Press Fit Connection with High Temp O-Ring Sea..
$42.68
Brand: Wehrli Custom Fabrication Part Number: WCF100517
Aluminum Upper Coolant Pipe for 2010-2018 6.7L Cummins replaces the OEM rubber upper coolant hose and comes powder coated in your choice of colors! For use with OEM RAM radiator. Aftermarket radiators may cause fitment issues.***NOT COMPATIBLE WITH 2013-2015 TRUCKS EQUIPPED WITH DUAL RADIATORS OR TR..
$144.53
Brand: Wehrli Custom Fabrication Part Number: WCF100269
2011-2016 LML Crew Cab Duramax Fass Fuel System Relocation Mounting Bracket. Relocates the FASS fuel system to underneath the truck just before the fuel tank.**NOT COMPATIBLE on a regular cab or extended cab models**-Mount Bracket-Zinc primer & Semi gloss black powder coat finishWCFAB: WCF1..
$101.85
Brand: Wehrli Custom Fabrication Part Number: WCF100704
Replace the restrictive crushed factory down pipe on your 2011-2016 LML Duramax with this full 3" Stainless Steel down pipe. For use with factory turbo or factory style drop in turbo on trucks using a v-band connection style exhaust, NOT the 3 bolt flange style exhaust.Replaces the following GM Part..
$251.23
Brand: Wehrli Custom Fabrication Part Number: WCF100121
Replace the restrictive crushed factory down pipe with this full 3" down pipe. For use with factory turbo or factory style drop in turbo.Replaces the following GM Part Numbers: 12643610, 12638304, 12643214Note: 2015.5 and newer LML have a 3 bolt flange exhaust system, this down pipe will only work i..
$212.43
Brand: Wehrli Custom Fabrication Part Number: WCF100096
This quick and easy to install, billet aluminum plate allows you to clean up your engine bay in minutes by removing the big plastic resonator connected to the intake. 100% warranty and emissions friendly. CNC machined in the USA from 6061 aluminum. Black anodized finish with engraved Wehrli Custom F..
$42.68
Brand: Wehrli Custom Fabrication Part Number: WCF205-140
Fits: 2013-2018 Ram 6.7L CumminsThis Wehrli Custom Fab #12 JIC Coolant Fitting gives you a chance to fabricate a custom cooling system in your 2013-2018  Ram 6.7L Cummins. This #12 JIC Male Fitting is built with CNC Machined Billet Aluminum and has a press fit high-temp O-ring seal and a mounti..
$42.68
Brand: Wehrli Custom Fabrication Part Number: WCF100709
2017-2019 L5P Duramax 4" Intake Pipe/Resonator Delete for the Factory Turbo Includes: 4" Intake Pipe Silicone Hump Boots T-Bolt Clamps Powder Coating WCFAB part number: WCF100709 Click here for Wehrli powder coat samples Wehrli Custom Powder Coating is housed under the same roof as Weh..
$207.58
Brand: Wehrli Custom Fabrication Part Number: WCF100433
Fits: 2017-2019 GM 6.6L Duramax L5P Decorate under your hood with this Wehrli Custom Fab Coolant Tank (OEM Location). Each tank featured a unique welded fabricated design to give you a special, stylish and custom look, under the hood of your truck. This Coolant Tank upgrade replaces the outdated ..
$454.93
Brand: Wehrli Custom Fabrication Part Number: WCF100469
As a direct replacement for the failure prone OEM thermostat, the Transmission Cooler Thermostat Bypass Plug can drop fluid temperature from 15-50 degrees F by reducing fluid flow restriction to the trans cooler. In the stock application, we've seen the valve fail forcing trans fluid around the cool..
$54.32
Brand: Wehrli Custom Fabrication Part Number: WCF10045x
These kits are the perfect solution for trucks with bigger turbo kits and injectors that have reached the limits of the stock HP4 pump and are in search of more power.***Requires use of an aftermarket low pressure / CP3 compatible lift pump with 15-20PSI of pressure. Not compatible with OEM L5P in-t..
$2,323.15
Brand: Wehrli Custom Fabrication Part Number: WCF100361
Increase fuel filter capacity and amount of time between filter changes on your 2017-2019 & 2020-2023 Long Bed L5P Duramax by upgrading from a stock cartridge style filter to our spin-on canister style filter. Featuring an anodized billet aluminum fuel filter base, this upgrade kit installs in t..
$229.89
Brand: Wehrli Custom Fabrication Part Number: WCF100624
Replace the lightweight, leak prone, 1 5/8" OEM up pipes on your 2017-2023 Newer Duramax with these heavy duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGT's. This kit is for use with factory exhaust manifolds..
$635.35
Brand: Wehrli Custom Fabrication Part Number: WCF100129
Replace the restrictive crushed factory downpipe on your 2017-2024 L5P Duramax with this 3.5" Down Pipe for improved exhaust flow.  Black Ceramic Coated and Heat wrapped.  Down Pipe includes bungs for sensors and NO tuning required to use this downpipe. ***Connects to the DOC (Diesel ..
$309.43
Brand: Wehrli Custom Fabrication Part Number: WCF100373
WCFab’s 2017-2024 Duramax Billet Exhaust Manifolds with EGR Riser Flange replace the restrictive factory cast parts with high-strength, TIG-welded high-flow billet steel components designed to enhance exhaust flow characteristics, improving turbo spool up, lowering EGTs and increasing power and econ..
$1,450.15
Brand: Wehrli Custom Fabrication Part Number: WCF100473
This quick and easy to install, billet aluminum plug allows you to clean up your engine bay and get more aggressive turbo sound in minutes by removing the big plastic resonator connected to your OEM intake. 100% warranty and emissions friendly. CNC machined in the USA from 6061 aluminum. Black anodi..
$27.16
Brand: Wehrli Custom Fabrication Part Number: WCF100199
The WCFab L5P Up Pipe Bolt Kit is comprised of 12 specially selected high-strength ARP fasteners and matched washers with a pack of assembly lube are designed as an upgrade to the smaller and failure prone 8mm OEM fasteners employed on the 2017 and newer 6.6L Duramax engines to connect the up pipes ..
$55.29
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High-Quality Turbo Install Kits From Wehrli Custom Fab

Innovation and performance are what Wehrli Custom Fabrication Inc. is all about. Hitting the ground running in 2010, Wehrli made waves with their commitment to quality and exceptional performance. Each of their turbo install kits comes in a variety of powder coatings and finishes that allow you to match the color profile of your diesel truck. Available for Powerstroke, Cummins and Duramax diesel engines, Wehrli Custom Fabrication turbo install kits are ready to kick your performance level into the stratosphere.

Wehrli Custom Fabrication Cold Air Intakes and More

Wehrli doesn't stop with turbo install kits. They also offer custom cold air intakes and bridge kits to enhance airflow into your engine and ensure an adequate supply for combustion. Diesel engines love Wehrli Custom Fabrication's intake kits and it shows up under performance testing. We also offer traction bar kits, downpipes and CP3 install kits from Wehrli Custom Fabrication. All of their products come with the same great commitment to quality and performance.

Frequently Asked Questions About Our Wehrli Custom Fab Pipes and Turbo Kits

Wehrli Custom Fab pipes not only look great but also offer excellent quality and performance from a trusted name in aftermarket diesel engine parts. Learn more about Wehrli and the rest of our products with some frequently asked questions.

How Long Does Shipping Take On Wehrli Custom Fabrication Products?

Due to the custom nature of Wehrli Custom Fab pipes and turbo kits, we ask that our customers allow for 9 - 11 weeks for shipping. Free shipping is available on orders of $150 within the continental United States.

Where Are Wehrli Products Manufactured?

All products from Wehrli Custom Fabrication Inc. are manufactured right here in the USA. Powder coating, CNC machining and welding all take place in their state-of-the-art facility in Illinois.

What If I Can't Find the Wehrli Parts I Am Looking For?

If you need help finding the Wehrli Custom Fab parts you need, feel free to contact us. If we don't have it in our inventory, we may be able to source it for you for less than you could get from other websites.

Get Wehrli Custom Fabrication Parts From Pure Diesel Power

Boost the performance of your diesel pickup with Wehrli turbo kits from Pure Diesel Power. Our high-quality Wehrli products are designed to increase horsepower, torque and overall driving experience. Whether you're looking to upgrade your current setup or starting from scratch, parts from Wehrli Custom Fabrication Inc. have you covered. Find the best solution for your needs with aftermarket performance parts from Pure Diesel Power. Don't settle for mediocre performance any longer. Get Wehrli Custom Fab pipes today.