Wehrli Fab

Replacement Dry Air Filter used in WCFab 4" Intake kits and S300 Single Install Kits. This Product is to be used for Off-road Race applications ONLY! Cannot Ship to State of California

Replacement Dry Air Filter used in WCFab Twin Turbo and S400 Single Install Kits.

LLY, LBZ, LMM Duramas One Piece High Flow 3" Driver Side Intercooler pipe. Replaces the 2 1/2" OEM inter cooler with a full 3" pipe. The OEM Pipe uses a reverse style bead roll design at the turbo which is prone for blowing off of the turbo under higher...

Outerwears Air Filter Cover for all WCFab air filters used in our turbo kits and intake kits.

3 1/2" Turbo Intake Horn for the 2017-2019 L5P Duramax with factory style Turbo. The OEM plastic intake horn is 2.4" diameter and we experienced a 25HP Gain with our 3.5" Horn when used with a Max Effort Tune. Tuning not required, this horn will work...

Replace the light weight, leak prone OEM up pipes with this heavy duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spoolup and decrease EGT's. This kit is for use with single turbo...

For 1999-2018 Ford and Dodge HD Trucks. Built in house at WCFab carrying a LIFETIME WARRANTY against bending or breaking (to original purchaser). Traction bars are a necessary upgrade when increasing the horsepower on your diesel truck to prevent the...

WCFab 2017-2019 GM L5P 6.6L Duramax 4" Intake Kit with Air Box. This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved engine...

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...

2011-2016 LML Duramax Coolant Bypass Kit.Preformed rubber hose routes coolant from thermostat housing to firewall/heater core connection with pre-installed GM quick connect fitting. Billet aluminum anodized plug installs into rear engine cover coolant...

2011-2016 LML Crew Cab Duramax Fass Mount Bracket to locate pump under truck in front of fuel tank.

2001-2004 LB7 Duramax 4" high flow intake kit for factory turbo.

The 3" High Flow Driver side Intercooler pipe for 2011-2016 LML Duramax replaces the factory two piece 2 ½" pipe with a high flow one piece 3" pipe. It also includes upgraded silicone boots that withstand higher pressure and temperature than the...

Increase fuel filter capacity and amount of time between filter changes on your 2017+ 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...

>The 3" High Flow Driver side Intercooler pipe for the 2017 L5P Duramax. Replaces the factory two piece 2 ½" inter cooler pipe with a high flow one piece 3" pipe. It also includes upgraded silicone boots that withstand higher pressure and temperature...

Heavy Duty Traction Bar Kit for 2001-2010 Duramax HD Trucks. We use a poly bushing at the axle mount for decreased road noise & vibration and Curry Enterprise Zinc Coated Johnny Joints at the frame side connection. The bars are 60" Long DOM Steel...

Built in house at WCFab carrying a LIFETIME WARRANTY against bending or breaking (to original purchaser). Traction bars are a necessary upgrade when increasing the horsepower on your diesel truck to prevent the axle from twisting which can lead to broken...

Clean up the engine bay of your 1999-2019 GM 1500/2500/3500 truck with this anodized billet aluminum brake reservoir cap from WCFab. This is a complete cap not a cover. Direct OEM replacement. CNC machined in the USA from billet aluminum. Reuses your...

The 3" High Flow Driver side Intercooler pipe for the 2020+ 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...

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.

Upper Coolant Pipe for 2020+ L5P Duramax replaces the ugly OEM rubber upper radiator hose with a fabricated aluminum hard pipe powder coated in your color of choice!

High Flow Intake Bundle Package for 2003-2007 5.9L Cummins. Saves ~$48.00 vs buying all components individually!

Kit to remove the the High Pressure Fuel Relief Valve located on top of an LB7 intake runner to clear larger Y-bridges.

Valley CP3 Block Off Plate, for 2001-2016 Duramax

Duramax Twin CP3 Pump Controller to operate dual CP3's. 2001-2005 PN: WCF100093 & 2006-2016 PN: WCF100094

Duramax Twin CP3 Pump Controller to operate dual CP3's. 2001-2005 PN: WCF100093 & 2006-2016 PN: WCF100094

Twin CP3 Pump Controller to operate dual CP3's

Fabricated Aluminum Rear Differential Cover for AAM 11.5 Axle for Dodge and GM HD Trucks

3" LB7 Turbo Downpipe for use with OEM charger or Stealth series Drop in. High Temp Coated and Heat Wrap included.

Replace the restrictive crushed factory down pipe with this full 3" down pipe. High Temp coated for protection. For use with factory turbo or factory style drop in the turbo.