WEHRLI CUSTOM FABRICATION
Wehrli Custom Fabrication Inc. specializes in high-performance diesel upgrades and custom metal fabrication. With a focus on quality, fitment, performance, and customer service, WCFab offers a wide range of MADE IN THE USA turbo kits and custom performance parts for Duramax, Powerstroke, and Cummins Diesel trucks. Whether you use your truck for work, play, or competition, Wehrli Custom Fabrication has the products you need to enhance your diesel truck's performance.
Some of the top products in this category include the WEHRLI WCF100023 01-04 CHEVROLET 6.6L LB7 DURAMAX FUEL PRESSURE RELIEF VALVE DELETE KIT, WEHRLI WCF100024 01-16 CHEVROLET 6.6L DURAMAX VALLEY CP3 BLOCK OFF PLATE, and WEHRLI WCF100096 11-16 CHEVROLET 6.6L LML DURAMAX TURBO RESONATOR BILLET BLOCK OFF PLATE. Additionally, products like the WEHRLI WCF100229 01-05 & 11-16 CHEVROLET 6.6L DURAMAX HIGH FLOW RAIL FITTING and the WEHRLI WCF100271 01-16 CHEVROLET 6.6L DURAMAX TWIN CP3 PULLEY DEEP OFFSET provide options for those looking to further customize their diesel trucks.
When you choose Wehrli Custom Fabrication, you can trust that you are getting top-of-the-line products designed to enhance the performance of your diesel truck. Upgrade your Duramax, Powerstroke, or Cummins Diesel truck with the best parts in the industry from Wehrli Custom Fabrication.
Some of the top products in this category include the WEHRLI WCF100023 01-04 CHEVROLET 6.6L LB7 DURAMAX FUEL PRESSURE RELIEF VALVE DELETE KIT, WEHRLI WCF100024 01-16 CHEVROLET 6.6L DURAMAX VALLEY CP3 BLOCK OFF PLATE, and WEHRLI WCF100096 11-16 CHEVROLET 6.6L LML DURAMAX TURBO RESONATOR BILLET BLOCK OFF PLATE. Additionally, products like the WEHRLI WCF100229 01-05 & 11-16 CHEVROLET 6.6L DURAMAX HIGH FLOW RAIL FITTING and the WEHRLI WCF100271 01-16 CHEVROLET 6.6L DURAMAX TWIN CP3 PULLEY DEEP OFFSET provide options for those looking to further customize their diesel trucks.
When you choose Wehrli Custom Fabrication, you can trust that you are getting top-of-the-line products designed to enhance the performance of your diesel truck. Upgrade your Duramax, Powerstroke, or Cummins Diesel truck with the best parts in the industry from Wehrli Custom Fabrication.
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WEHRLI WCF100361 17-19 DURAMAX L5P / 2020+ L5P DURAMAX LONG BED FUEL FILTER HOUSING KIT
WEHRLI CUSTOM FABRICATION
$229.89Increase fuel filter capacity and time between filter changes on your 2017-2019 Chevrolet Silverado or GMC Sierra (as well as 2020-2024 Long Bed trucks) equipped with the L5P Duramax 6.6L diesel engine by upgrading from a stock cartridge style filter to...$229.89 -
WEHRLI WCF100189 04.5-2010 DURAMAX LLY/LBZ/LMM CRANKCASE VENT (PCV) FITTING KIT - BILLET BLACK ANODIZED
WEHRLI CUSTOM FABRICATION
$44.62Replace 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...$44.62 -
WEHRLI WCF100459 20+ GM 2500/3500 HD LOWER SPLASH SHIELD KIT
WEHRLI CUSTOM FABRICATION
$288.84The WCFab Splash Shield Kit for 2020-2025 Chevrolet Silverado 2500/3500 HD and GMC Sierra/Denali 2500/3500 HD trucks replace the easily damaged factory plastic part covering the lower engine bay and cooling stack. Our heavy gauge aluminum splash shield...$288.84 -
WEHRLI WCF100420 06-10 DURAMAX LBZ/LMM THERMOSTAT HOUSING KIT
WEHRLI CUSTOM FABRICATION
$421.73The Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for 2006-2010 LBZ/LMM 6.6L Duramax replaces the OEM upper radiator hose that normally crosses over the driver side valve cover as well as the coolant return pipe. By changing the coolant...$421.73 -
WEHRLI WCF100424 2006-2010 LBZ/LMM DURAMAX TOP OUTLET BILLET THERMOSTAT HOUSING AND UPPER COOLANT PIPE KIT FOR DUAL CP3
WEHRLI CUSTOM FABRICATION
$421.73The Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for 2006-2010 LBZ/LMM Duramax replaces the OEM upper radiator hose that normally crosses over the driver side valve cover as well as the coolant return pipe. By changing the coolant...$421.73 -
WEHRLI WCF100867 2013-2015 6.7L CUMMINS UPPER COOLANT PIPE FOR DUAL RADIATOR
WEHRLI CUSTOM FABRICATION
$227.73Aluminum Upper Coolant Pipe with Y-Connector for 2013-2015 6.7L Cummins equipped Ram 2500 / 3500 HD trucks equipped with DUAL (2) RADIATORS. Replaces the OEM rubber upper coolant hose with failure prone plastic connector which is known for developing...$227.73 -
WEHRLI WCF100443 2001+ GM DURAMAX LB7/LLY/LBZ/LMM/LML/L5P BILLET OIL FILL CAP - BLACK ANODIZED
WEHRLI CUSTOM FABRICATION
$49.47Clean up the engine bay of your 2001-2025 Chevy Silverado or GMC Sierra 2500 / 3500 truck equipped with the 6.6L 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...$49.47 -
WEHRLI WCF100442 2001+ GM DURAMAX LB7/LLY/LBZ/LMM/LML/L5P BILLET OIL FILL CAP - CLEAR ANODIZED
WEHRLI CUSTOM FABRICATION
$49.47Clean up the engine bay of your 2001-2025 Chevy Silverado or GMC Sierra 2500 / 3500 6.6L truck equipped with the 6.6L Duramax with this Billet Aluminum Clear Anodized Oil Fill Cap from WCFab. This is a complete cap, not a cover. Direct OEM replacement...$49.47 -
WEHRLI WCF100831 2020+ CHEVROLET DURAMAX TRACTION BAR INSTALL KIT
WEHRLI CUSTOM FABRICATION
$252.20Built in house at WCFab our traction bar brackets bolt on to the bottom of the axle tube via the axle u-bolts and weld to the frame on the front end. Grade 8 hardware connects the bars to the mounts on the frame and axle. ***THIS IS A REPLACEMENT...$252.20 -
WEHRLI WCF100796 06-10 LBZ/LMM DURAMAX MAP SENSOR SEAL & BRACKET
WEHRLI CUSTOM FABRICATION
$15.52Map Sensor Seal and Bracket used on LB7/LBZ/LMM's when installing WCFab Y-bridge or turbo kits. If your Map sensor is connected to your intake manifold via a hose and IS NOT directly bolted to the intake manifold, then you will need this seal and bracket...$15.52 -
WEHRLI WCF100390 2020+ GMC 2500/3500HD FENDER FLARE MARKER LIGHT DELETE KIT
WEHRLI CUSTOM FABRICATION
$241.53Clean up the look of your 2020-2025 GMC Sierra or Denali 2500 or 3500 HD truck by replacing the amber fender flare marker lights with these CAD Designed, CNC machined, billet aluminum marker light delete plates from WCFab. Available with machined WCFab...$241.53 -
WEHRLI WCF100391 2020+ GMC 2500/3500HD FENDER FLARE MARKER LIGHT DELETE KIT W/O LOGO - RAW FINISH
WEHRLI CUSTOM FABRICATION
$241.53Clean up the look of your 2020-2025 GMC Sierra or Denali 2500 or 3500 HD truck by replacing the amber fender flare marker lights with these CAD Designed, CNC machined, billet aluminum marker light delete plates from WCFab. Available with machined WCFab...$241.53 -
WEHRLI WCF100392 2020+ GMC 2500/3500HD FENDER FLARE MARKER LIGHT DELETE KIT W/LOGO - FINE TEXTURE BLACK
WEHRLI CUSTOM FABRICATION
$290.03High Flow Intake Bundle Package for 2003-2007 5.9L Cummins. Saves $29.00 vs buying components individually! This Kit Includes: WCF100544 - 3" Passenger Side Intercooler Pipe WCF100528 - 3.5" Driver Side Intercooler Pipe and Intake Horn Kit Replaces the...$290.03 -
WEHRLI WCF100393 2020+ GMC 2500/3500HD FENDER FLARE MARKER LIGHT DELETE KIT W/O LOGO - FINE TEXTURE BLACK
WEHRLI CUSTOM FABRICATION
$290.03Clean up the look of your 2020-2025 GMC Sierra or Denali 2500 or 3500 HD truck by replacing the amber fender flare marker lights with these CAD Designed, CNC machined, billet aluminum marker light delete plates from WCFab. Available with machined WCFab...$290.03 -
WEHRLI WCF100472 2001+ CHEVROLET DURAMAX/13-18 6.7L DODGE CUMMINS BILLET ALUMINUM COOLANT TANK CAP - CLEAR
WEHRLI CUSTOM FABRICATION
$35.8418-20PSI Replacement Coolant Tank Cap, Clear Anodized. Used on WCFab Fabricated Coolant Tanks on 2001-2024 Duramax or 2004.5-2007 & 2010-2024 6.7L Cummins. - Replacement Cap for WCFab Coolant Tank- Clear Anodized Finish The WEHRLI WCF100472...$35.84 -
WEHRLI WCF100428-FTB 15-19 CHEVROLET 2500/3500 FRONT BUMPER VALANCE FILLER PANEL KIT W/O TOW HOOKS - TEXTURE BLACK
WEHRLI CUSTOM FABRICATION
$257.05Enhance the appearance and functionality of your 15-19 Chevrolet 2500/3500 with the WEHRLI WCF100428-FTB Front Bumper Valance Filler Panel Kit. This kit is designed to seamlessly fit your vehicle, adding a rugged and aggressive look while providing...$257.05 -
WEHRLI WCF100426 2015-2019 CHEVROLET SILVERADO 2500/3500HD LOWER VALANCE FILLER PANEL WITHOUT TOW HOOK CUTOUTS
WEHRLI CUSTOM FABRICATION
$208.55Removing the OEM plastic lower bumper valance on the 2015-2019 Chevrolet Silverado 2500 / 3500 HD trucks is a proven method for improving ground clearance and fitting more aggressive wheel and tire combinations, but it leaves an unattractive, gaping void...$208.55 -
WEHRLI WCF100444 2020+ GM 2500/3500 HD BUMPER SPACER KIT - 3/4IN
WEHRLI CUSTOM FABRICATION
$183.332020-2025 Silverado and Sierra 2500HD / 3500HD CNC machined billet aluminum spacer kits from WCFab move the front bumper forward off the frame horns 3/4 of an inch while maintaining maximum mounting surface area for structural integrity. Moving the...$183.33 -
WEHRLI WCF100462 15-19 GM 2500/3500 HD BUMPER SPACER KIT - 3/4IN
WEHRLI CUSTOM FABRICATION
$231.832015-2019 Silverado and Sierra 2500HD / 3500HD CNC machined billet aluminum spacer kits from WCFab move the front bumper forward, keeping it off the frame horns 3/4 of an inch while maintaining the maximum mounting surface area for structural integrity...$231.83 -
WEHRLI WCF100453 15-19 GM 2500/3500 HD BUMPER SPACER KIT - 3/8IN
WEHRLI CUSTOM FABRICATION
$173.632015-2019 Silverado and Sierra 2500HD / 3500HD CNC machined billet aluminum spacer kits from WCFab move the front bumper forward, keeping it off the frame horns 3/8 of an inch while maintaining the maximum mounting surface area for structural...$173.63 -
WEHRLI WCF100446 2020+ GM 2500/3500 HD BUMPER SPACER KIT - 3/8IN
WEHRLI CUSTOM FABRICATION
$131.922020-2025 Silverado and Sierra 2500HD / 3500HD CNC machined billet aluminum spacer kits from WCFab move the front bumper forward, keeping it off the frame horns 3/8 of an inch, maintaining the maximum mounting surface area for structural integrity...$131.92 -
WEHRLI WCF100427 2015-2019 CHEVROLET SILVERADO 2500/3500HD LOWER VALANCE FILLER PANEL WITH TOW HOOK CUTOUTS
WEHRLI CUSTOM FABRICATION
$257.05The WEHRLI WCF100427 2015-2019 Chevrolet Silverado 2500/3500HD Lower Valance Filler Panel with Tow Hook Cutouts is your solution for enhancing the look of your lifted or leveled truck. Designed to fill the void created by removing the OEM plastic lower...$257.05 -
WEHRLI WCF100425 15-19 CHEVROLET 2500/3500 FRONT BUMPER VALANCE FILLER PANEL KIT W/TOW HOOKS
WEHRLI CUSTOM FABRICATION
$208.55Removing the OEM plastic lower bumper valance on the 2015-2019 Chevrolet Silverado 2500 / 3500 HD trucks is a proven method for improving ground clearance and fitting more aggressive wheel and tire combinations. Still, it leaves an unattractive, gaping...$208.55 -
WEHRLI WCF100473 2017+ CHEVROLET 6.6L L5P DURAMAX INTAKE RESONATOR DELETE PLUG - BLACK ANODIZED
WEHRLI CUSTOM FABRICATION
$27.16This 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...$27.16 -
WEHRLI WCF100469 17-19 L5P DURAMAX BILLET ANODIZED TRANSMISSION COOLER THERMOSTAT BYPASS PLUG
WEHRLI CUSTOM FABRICATION
$54.32As 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...$54.32 -
WEHRLI WCF100541 2020-2024 L5P DURAMAX UPPER COOLANT PIPE KIT
WEHRLI CUSTOM FABRICATION
$179.23Upper Coolant Pipe for 2020-2025 L5P 6.6L Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 truck replaces the ugly OEM rubber upper radiator hose with a fabricated aluminum hard pipe powder coated in your color of choice! For use with...$179.23 -
WEHRLI WCF100381 2020-2024 L5P DURAMAX 3.5" PASSENGER (COLD) SIDE INTERCOOLER PIPE KIT
WEHRLI CUSTOM FABRICATION
$369.35The WCFab 3.5" High Flow Passenger Side Intercooler Pipe for 2020-2025 L5P 6.6L Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck replaces the restricted OEM rubber/plastic design with a high flow, 14 ga. aluminum one piece 3.5"...$369.35 -
WEHRLI WCF100833 2020-2024 L5P DURAMAX 3.5" TURBO INTAKE HORN
WEHRLI CUSTOM FABRICATION
$251.983.5 inch Turbo Intake Horn for the 2020-2024 L5P Duramax with factory style Turbo. Improves airflow to turbo by removing restrictions in the factory horn right before the turbo inlet. Tuning is not required; this horn will work plug and play tuners or...$251.98 -
WEHRLI WCF100517 10-18 DODGE 6.7L CUMMINS (NON 13-15 W/DUAL RADS/TWIN CP3) UPPER COOLANT PIPE
WEHRLI CUSTOM FABRICATION
$169.53Aluminum Upper Coolant Pipe for 2010-2018 6.7L Cummins equipped Ram 2500 / 3500 HD trucks. Replaces the OEM rubber upper coolant hose for the radiator inlet and comes powder coated in your choice of colors! For use with OEM RAM radiator. Aftermarket...$169.53 -
WEHRLI WCF100365 2020-2024 L5P DURAMAX 3" DRIVER (HOT) SIDE INTERCOOLER PIPE KIT
WEHRLI CUSTOM FABRICATION
$330.55The 3" High Flow Driver side Intercooler pipe for the 2020-2025 L5P Duramax. Replaces the OEM two piece design with a high flow one piece 3" pipe. It also includes upgraded silicone boots that withstand higher pressure and temperature than the factory...$330.55 -
WEHRLI WCF100216 99-22 GM 1500/2500/3500 BILLET ALUMINUM BRAKE MASTER CYLINDER CAP - BLACK ANODIZED
WEHRLI CUSTOM FABRICATION
$40.74Clean up the engine bay of your 1999-2025 Chevy Silverado or GMC Sierra 1500/2500/3500 truck with this anodized billet aluminum brake reservoir cap from WCFab. This is a complete cap not a cover. CNC machined in the USA from billet aluminum. Direct...$40.74 -
WEHRLI WCF100215 99-22 GM 1500/2500/3500 BILLET ALUMINUM BRAKE MASTER CYLINDER CAP - CLEAR ANODIZED
WEHRLI CUSTOM FABRICATION
$40.74Clean up the engine bay of your 1999-2025 Chevy Silverado or GMC Sierra 1500/2500/3500 truck with this anodized billet aluminum brake reservoir cap from WCFab. This is a complete cap not a cover. CNC machined in the USA from billet aluminum...$40.74 -
WEHRLI WCF100129 17-22 CHEVROLET/GMC 6.6L L5P DURAMAX 3.5IN DOWN PIPE
WEHRLI CUSTOM FABRICATION
$309.43Enhance the performance and efficiency of your 2017-2024 Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck equipped with the L5P 6.6L Duramax engine with the WEHRLI WCF100129 3.5" Down Pipe. Designed to replace the restrictive factory downpipe/front...$309.43 -
WEHRLI WCF100240 01-16 CHEVROLET 6.6L LB7/LLY/LBZ/LMM/LML DURAMAX UP PIPE BOLT KIT
WEHRLI CUSTOM FABRICATION
$33.95The WCFab ARP Bolt Kit for 2001-2016 Duramax Up Pipes or LB7 Turbo Down Pipes 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 aging OEM...$33.95 -
WEHRLI WCF100199 17-22 CHEVROLET/GMC 6.6L L5P DURAMAX UP PIPE BOLT KIT
WEHRLI CUSTOM FABRICATION
$55.29The 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...$55.29 -
WEHRLI WCF100528 2003-2007 5.9L CUMMINS 3.5" HIGH FLOW INTAKE HORN & INTERCOOLER PIPE KIT
WEHRLI CUSTOM FABRICATION
$557.532003-2007 5.9L Cummins High Flow 3.5” Intake Horn and Driver Side Intercooler Pipe Kit. Kit replaces the failure prone 3” plastic OEM intercooler pipe with a 3.5” heavy duty 14g Aluminum intercooler pipe and the OEM cast intake horn...$557.53 -
WEHRLI WCF100359 2003-2007 5.9L CUMMINS 3" DRIVER (COLD) SIDE REPLACEMENT INTERCOOLER PIPE
WEHRLI CUSTOM FABRICATION
$223.85Driver Side 3" Intercooler Pipe for use with OEM style Intake Horn and intercooler. Replaces leak prone plastic OEM parts with high quality mandrel bent aluminum pipe, silicone boots and stainless T-bolt clamps to eliminate boost leaks encountered with...$223.85 -
WEHRLI WCF100346 2003-2007 5.9L CUMMINS 4" INTAKE KIT
WEHRLI CUSTOM FABRICATION
$387.034" Intake Kit for 2003-2007 Dodge Ram 2500 / 3500 5.9L Cummins with Factory or OEM style Turbocharger. This high flow, fabricated aluminum intake pipe with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved...$387.03 -
WEHRLI WCF100530 17-19 CHEVROLET 6.6L L5P DURAMAX PASSENGER SIDE 3.5IN INTERCOOLER PIPE
WEHRLI CUSTOM FABRICATION
$286.15The WCFab 3.5" High Flow Passenger (Cold) Side Intercooler Pipe for 2017-2019 L5P 6.6L Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck replaces the factory plastic two piece pipe with a high flow, 14 ga. aluminum one piece 3.5"...$286.15 -
WEHRLI WCF100863 2007.5-2009 6.7 CUMMINS 4" INTAKE KIT
WEHRLI CUSTOM FABRICATION
$425.832007.5-2009 6.7 Cummins 4" Intake Kit for Factory Turbocharger. This intake works in-conjunction with the factory turbo. 10-12 6.7 Cumins trucks, please see WCF100875 13-18 6.7 Cummins trucks, please see WCF100881 -4" Intake-Dry Air filter-Outerwear's...$425.83 -
WEHRLI WCF100860 2001-2005 LB7 / LLY DURAMAX UPPER COOLANT PIPE
WEHRLI CUSTOM FABRICATION
$130.95High Flow Intake Bundle Package for 2003-2007 5.9L Cummins. Saves $50.00 vs buying all components individually! This Kit Includes: WCF100544 - 3" Passenger Side Intercooler Pipe WCF100528 - 3.5" Driver Side Intercooler Pipe and Intake Horn...$130.95 -
WEHRLI WCF100842 FORD/DODGE/UNIVERSAL TRACTION BAR INSTALL KIT
WEHRLI CUSTOM FABRICATION
$112.52Built in house at WCFab our traction bar brackets weld on to the bottom of the axle tube and weld to the frame on the front end. Grade 8 hardware connects the bars to the mounts on the frame and axle. ***THIS IS A REPLACEMENT HARDWARE / INSTALL KIT,...$112.52 -
WEHRLI WCF100841 11-19 CHEVROLET 6.6L DURAMAX TRACTION BAR INSTALL KIT
WEHRLI CUSTOM FABRICATION
$252.20Built in house at WCFab our traction bar brackets bolt on to the bottom of the axle tube via the axle u-bolts and weld to the frame on the front end. Grade 8 hardware connects the bars to the mounts on the frame and axle. ***THIS IS A REPLACEMENT...$252.20 -
WEHRLI WCF100840 01-10 CHEVROLET 6.6L DURAMAX TRACTION BAR INSTALL KIT
WEHRLI CUSTOM FABRICATION
$252.20Built in house at WCFab our traction bar brackets bolt on to the bottom of the axle tube via the axle u-bolts and weld to the frame on the front end. Grade 8 hardware connects the bars to the mounts on the frame and axle. ***THIS IS A REPLACEMENT...$252.20 -
WEHRLI WCF100800 UNIVERSAL T4 SPACER PLATE KIT 1IN W/STUDS & GASKETS
WEHRLI CUSTOM FABRICATION
$120.281" Thick Steel Divided T4 Spacer Plate Kit, Ceramic Coated Black. Includes M10 Mounting Studs 65MM long, nuts, and two T4 Gaskets. -1" T4 Spacer Plate, Ceramic Coated-M10 Studs & Nuts-(2) T4 Gaskets The WEHRLI WCF100800 UNIVERSAL T4 SPACER...$120.28 -
WEHRLI WCF100742 2017-2019 L5P DURAMAX UPPER COOLANT PIPE KIT
WEHRLI CUSTOM FABRICATION
$144.53Aluminum Upper Coolant Pipe for 2017-2019 L5P Duramax replaces the OEM rubber upper coolant hose and comes powder coated color of choice! For use with OEM GM radiator. Aftermarket radiators may cause fitment issues. Replaces the following GM Part...$144.53 -
WEHRLI WCF100728 UNIVERSAL OUTERWEAR AIR FILTER COVER (USE W/WCF AIR FILTERS)
WEHRLI CUSTOM FABRICATION
$41.71We use and recommend these Outerwears Air Filter Covers for all WCFab air filters used in our turbo kits and intake kits. These Pre-filters are designed to deflect the damaging debris, which can prematurely clog air filters, compromising peak...$41.71 -
WEHRLI WCF100721 17-19 CHEVROLET 6.6L L5P DURAMAX 3.5IN INTAKE HORN W/PCV PORT
WEHRLI CUSTOM FABRICATION
$226.983 1/2" Turbo Intake Horn for the 2017-2019 L5P Duramax with factory style Turbo. The OEM plastic intake horn is 2.4" in diameter, and we experienced a 25HP Gain with our 3.5" Horn when used with a Max Effort Tune. Tuning is unnecessary; this horn will...$226.98 -
WEHRLI WCF100719 UNIVERSAL 5IN INLET DRY AIR FILTER (USE W/WCF KITS)
WEHRLI CUSTOM FABRICATION
$65.96Maintenance - The cleaning / replacement interval depends on your driving conditions. We recommend that you inspect your air filter every 5,000 miles by removing the filter cover and examining the pleats. Keeping your filter cover clean and blowing...$65.96 -
WEHRLI WCF100717 UNIVERSAL 4IN INLET DRY AIR FILTER (USE W/WCF KITS)
WEHRLI CUSTOM FABRICATION
$65.96Maintenance - The cleaning / replacement interval depends on your driving conditions. We recommend that you inspect your air filter every 5,000 miles by removing the filter cover and examining the pleats. Keeping your filter cover clean and blowing...$65.96 -
WEHRLI WCF100709 2017-2019 L5P DURAMAX 4" INTAKE RESONATOR PIPE
WEHRLI CUSTOM FABRICATION
$207.584" Intake Resonator Pipe for 2017-2019 L5P 6.6L Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck equipped with an OEM or drop in factory style turbocharger. Dress up your engine bay and remove the plastic turbo resonator box...$207.58 -
WEHRLI WCF100708 2017-2019 L5P DURAMAX 3" DRIVER (HOT) SIDE INTERCOOLER PIPE KIT
WEHRLI CUSTOM FABRICATION
$305.55WCFab 3" High Flow Driver (Hot) Side Intercooler pipe for the 2017-2019 L5P 6.6L Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck. -3" Hot Side Intercooler Pipe-14g Mandrel Bent Aluminum Construction-Silicone Boots-T-Bolt...$305.55 -
WEHRLI WCF100705 15.5-16 CHEVROLET 6.6L LML DURAMAX 3IN STAINLESS DOWN PIPE (3 BOLT FLANGE)
WEHRLI CUSTOM FABRICATION
$338.53Replace the restrictive crushed factory down pipe on your 2015.5-2016 LML Duramax with this full 3" Stainless steel down pipe. For use with factory turbo or factory style drop in turbo on trucks with the 3 bolt flange exhaust connection. Replaces the...$338.53 -
WEHRLI WCF100704 11-15 CHEVROLET 6.6L LML DURAMAX 3IN STAINLESS DOWN PIPE (V-BAND STYLE)
WEHRLI CUSTOM FABRICATION
$251.23Replace 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...$251.23 -
WEHRLI WCF100703 04.5-10 CHEVROLET 6.6L LLY/LBZ/LMM DURAMAX 3IN STAINLESS DOWN PIPE
WEHRLI CUSTOM FABRICATION
$227.95Replace the restrictive crushed factory turbo down pipe / exhaust front pipe on the 6.6L Duramax Diesel V8 found in the 2004.5 - 2010 Chevrolet Silverado / GMC Sierra 2500 / 3500 HD truck with this high flow, heat wrapped, full 3" Stainless steel down...$227.95 -
WEHRLI WCF100696 2011-2016 LML DURAMAX UPPER COOLANT PIPE
WEHRLI CUSTOM FABRICATION
$144.53Aluminum Upper Coolant Pipe for 2011-2016 LML Duramax replaces the OEM rubber upper coolant hose and comes powder coated color of choice! For use with OEM GM radiator! Some aftermarket radiators may cause fitment issues! Replaces the following GM Part...$144.53 -
WEHRLI WCF100654 01-04 CHEVROLET 6.6L DURAMAX LB7 2IN STAINLESS PASS. SIDE UP PIPE W/GASKETS (SINGLE TURBO)
WEHRLI CUSTOM FABRICATION
$309.43Replace the lightweight 16G, leak-prone passenger side OEM up pipe in your 2001-2004 6.6L LB7 Duramax with this heavy-duty 11 gauge 2" Stainless up pipe from WCFab. Our HD Stainless Bellow that will not crack and leak like OEM. Larger diameter and better...$309.43 -
WEHRLI WCF100652 01-16 CHEVROLET 6.6L DURAMAX 2IN STAINLESS DRIVER SIDE UP PIPE W/GASKETS (SINGLE/TWIN TURBO)
WEHRLI CUSTOM FABRICATION
$309.43Replace the lightweight 16G, 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,...$309.43 -
WEHRLI WCF100648 01-04 CHEVROLET 6.6L DURAMAX LB7 2IN STAINLESS PASSENGER SIDE UP PIPE W/GASKETS (TWIN TURBO)
WEHRLI CUSTOM FABRICATION
$309.43Replace the lightweight, leak-prone passenger side OEM up pipe with this heavy-duty 11 gauge 2" Stainless up pipe. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGTs. This up pipe is built with more...$309.43 -
WEHRLI WCF100647 2011-2016 LML DURAMAX OEM PLACEMENT COOLANT TANK KIT
WEHRLI CUSTOM FABRICATION
$435.53Fabricated Aluminum Coolant Tank Kit for 2011-2016 6.6L Duramax Diesel equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck. Mounts in OEM coolant tank location. Dress up your engine bay by replacing the ugly clear plastic coolant reservoir...$435.53 -
WEHRLI WCF100645 2001-2007 LB7 / LLY / LBZ DURAMAX OEM PLACEMENT COOLANT TANK KIT
WEHRLI CUSTOM FABRICATION
$435.532001-2007 Duramax Fabricated Aluminum Coolant Tank Kit, mounts in OEM coolant tank location. Dress up your engine bay by replacing the ugly clear plastic coolant reservoir with our custom powder coated fabricated aluminum coolant tank with sight...$435.53 -
WEHRLI WCF100642 2001-2007 LB7/LLY/LBZ DURAMAX TWIN TURBO COOLANT TANK KIT
WEHRLI CUSTOM FABRICATION
$334.65LB7, LLY, LBZ Duramax Fabricated Aluminum Coolant Tank Kit for Twin Turbo Applications mounts on passenger side fender. Does not allow use of passenger side battery in OEM location, must be relocated. -Coolant Tank-Low coolant...$334.65 -
WEHRLI WCF100628 13-18 DODGE 6.7L CUMMINS OEM PLACEMENT COOLANT TANK KIT
WEHRLI CUSTOM FABRICATION
$464.632003-2007 5.9L Cummins High Flow 3.5” Intake Horn and Driver Side Intercooler Pipe Kit. Kit replaces the failure prone 3” plastic OEM intercooler pipe with a 3.5” heavy duty 14g Aluminum intercooler pipe and the OEM cast intake horn...$464.63 -
WEHRLI WCF100624 17-22 CHEVROLET 6.6L L5P DURAMAX 2IN STAINLESS UP PIPE KIT W/GASKETS
WEHRLI CUSTOM FABRICATION
$635.35Replace the lightweight 16G, leak prone, 1 5/8" OEM up pipes on your 2017-2025 6.6L L5P Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck with these heavy duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not...$635.35 -
WEHRLI WCF100590 01-04 CHEVROLET 6.6L DURAMAX LB7 2IN STAINLESS UP PIPE KIT W/GASKETS - SINGLE TURBO
WEHRLI CUSTOM FABRICATION
$577.15Replace the lightweight 16G, 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...$577.15 -
WEHRLI WCF100589 01-04 CHEVROLET 6.6L DURAMAX LB7 2IN STAINLESS UP PIPE KIT W/GASKETS - TWIN TURBO
WEHRLI CUSTOM FABRICATION
$577.15High Flow Intake Bundle Package for 2003-2007 5.9L Cummins. Saves $29.00 vs buying components individually! This Kit Includes: WCF100544 - 3" Passenger Side Intercooler Pipe WCF100528 - 3.5" Driver Side Intercooler Pipe and Intake Horn Kit Replaces the...$577.15 -
WEHRLI WCF100429 01-16 CHEVROLET 6.6L DURAMAX TWIN CP3 PULLEY DEEP OFFSET - RAW FINISH
WEHRLI CUSTOM FABRICATION
$295.85The WEHRLI WCF100429 01-16 Chevrolet 6.6L Duramax Twin CP3 Pulley Deep Offset in Raw Finish is a top-of-the-line accessory designed to enhance the performance of your Chevrolet vehicle. Crafted from high-quality billet aluminum, this CP3 pulley boasts...$295.85 -
WEHRLI WCF100358 UNIVERSAL T4 SPACER PLATE KIT 1.5IN W/STUDS & GASKETS
WEHRLI CUSTOM FABRICATION
$139.681 1/2" Thick Steel Divided T4 Spacer Plate Kit, Ceramic Coated Black. Includes M10 Mounting Studs 2.75" long, nuts, washers, and two T4 Gaskets -1 1/2" T4 Spacer Plate, Ceramic Coated-M10 Studs, Nuts, & Washers-(2) T4 Gaskets Enhance the...$139.68 -
WEHRLI WCF100349 2001-2004 LB7 DURAMAX DRIVER (HOT) SIDE 3" INTERCOOLER PIPE KIT
WEHRLI CUSTOM FABRICATION
$280.331 Piece 3" Driver Side Intercooler pipe that was designed to replace the factory pipe and low-quality silicone boots. This Intercooler pipe compliments our S400 over stock twin turbo kit or LB7 Y-Bridge Kits. It is a full 3" intake tract from Turbo to...$280.33 -
WEHRLI WCF100342 01-04 CHEVROLET 6.6L LB7 DURAMAX 3.5IN INTAKE HORN
WEHRLI CUSTOM FABRICATION
$131.923 1/2" Turbo Intake Horn for 2001-2004 LB7 Duramax. Compatible with factory IHI Turbo or upgraded drop in IHI Turbos and OEM or aftermarket intakes. Great upgrade offering quicker spool up and more HP! Max-effort tuned trucks can see 10-15HP gains while...$131.92 -
WEHRLI WCF100333 2003-2007 6.0 POWERSTROKE 4" INTAKE KIT
WEHRLI CUSTOM FABRICATION
$411.28The WEHRLI WCF100333 2003-2007 6.0 Powerstroke 4" Intake Kit is the ultimate upgrade for your 2003-2007 Ford 6.0L Powerstroke engine. This high-flow intake kit is specifically designed for the factory-style turbo, ensuring optimal performance and...$411.28 -
WEHRLI WCF100271 01-16 CHEVROLET 6.6L DURAMAX TWIN CP3 PULLEY DEEP OFFSET - BLACK ANODIZED FINISH
WEHRLI CUSTOM FABRICATION
$310.40Enhance the performance of your Chevrolet 6.6L Duramax engine with the WEHRLI WCF100271 Twin CP3 Pulley. Designed for 01-16 Chevrolet models, this pulley features a deep offset design to optimize the functioning of the twin CP3 injection pumps in your...$310.40 -
WEHRLI WCF100269 11-16 CHEVROLET 6.6L DURAMAX FASS FUEL SYSTEM RELOCATION BRACKET (CREW CAB ONLY)
WEHRLI CUSTOM FABRICATION
$101.852011-2016 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...$101.85 -
WEHRLI WCF100265 01-10 CHEVROLET 6.6L DURAMAX FASS FUEL SYSTEM RELOCATION BRACKET (CREW CAB ONLY)
WEHRLI CUSTOM FABRICATION
$92.152001-2010 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...$92.15 -
WEHRLI WCF100230 04.5-10 CHEVROLET 6.6L DURAMAX HIGH FLOW RAIL FITTING (LONG)
WEHRLI CUSTOM FABRICATION
$59.17Long Stainless Steel Rail Fitting for LLY, LBZ, & LMM Driver side rail rear port. Also compatible with 6.7L Cummins applications. Ported 1/8" ID for increased fuel flow to eliminate restriction in the stock fitting which can cause rail pressure drops...$59.17 -
WEHRLI WCF100229 01-05 & 11-16 CHEVROLET 6.6L DURAMAX HIGH FLOW RAIL FITTING (SHORT)
WEHRLI CUSTOM FABRICATION
$37.83Short Stainless Steel Rail Fitting for LB7 & LLY or LML 6.6L Duramax Fuel Rails. Ported 1/8" ID for increased fuel flow to eliminate restriction in the stock fitting which can cause rail pressure drops in high performance applications. Fitment Note:...$37.83 -
WEHRLI WCF100121 11-15 CHEVROLET 6.6L LML DURAMAX 3IN DOWN PIPE (V-BAND STYLE)
WEHRLI CUSTOM FABRICATION
$212.43Replace 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, 12643214 Note: 2015.5 and newer LML have a 3...$212.43 -
WEHRLI WCF100120 04.5-10 CHEVROLET 6.6L LLY/LBZ/LMM DURAMAX 3IN DOWN PIPE
WEHRLI CUSTOM FABRICATION
$189.15Replace the restrictive crushed factory turbo down pipe / exhaust front pipe on the 6.6L Duramax Diesel V8 found in the 2004.5 - 2010 Chevrolet Silverado / GMC Sierra 2500 / 3500 HD truck with this high flow, heat wrapped, high temp ceramic coated full...$189.15 -
WEHRLI WCF100119 01-04 CHEVROLET 6.6L LB7 DURAMAX 3IN DOWN PIPE
WEHRLI CUSTOM FABRICATION
$222.133" LB7 Turbo Downpipe for use with OEM charger or Stealth series Drop in. High Temp Coated and Heat Wrap included. Compatible with both Standard & California Style Exhaust Flange. Replaces the following GM Part...$222.13 -
WEHRLI WCF100118 UNIVERSAL T4 SPACER PLATE KIT 0.5IN W/STUDS & GASKETS
WEHRLI CUSTOM FABRICATION
$79.541/2" Thick steel Divided T4 Spacer Plate Kit, Ceramic Coated Black. Includes M10 Mounting Studs 1" long, nuts, washers, and two T4 Gaskets -1/2" T4 Spacer Plate, Ceramic Coated-M10 Studs, Nuts, & Washers-(2) T4 Gaskets VEHICLE...$79.54 -
WEHRLI WCF100096 11-16 CHEVROLET 6.6L LML DURAMAX TURBO RESONATOR BILLET BLOCK OFF PLATE
WEHRLI CUSTOM FABRICATION
$42.68This 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...$42.68 -
WEHRLI WCF100024 01-16 CHEVROLET 6.6L DURAMAX VALLEY CP3 BLOCK OFF PLATE
WEHRLI CUSTOM FABRICATION
$66.93Billet Block Off plate for valley CP3 pump. Black anodized finish with engraved logo. Enhance the performance of your 2001-2016 Chevrolet 6.6L Duramax engine with the WEHRLI WCF100024 Billet CP3 Block Off Plate. Crafted to precision, this block off...$66.93 -
WEHRLI WCF100023 FUEL PRESSURE RELIEF VALVE DELETE KIT FOR 01-04 GM DURAMAX LB7 ENGINE
WEHRLI CUSTOM FABRICATION
$66.93This kit allows you to remove the Fuel Pressure Relief Valve (FPRV) located on top of the intake runner of your LB7 6.6L Duramax. This modification allows the necessary clearance needed to run larger aftermarket y-bridges or turbo inlets which would...$66.93