Wehrli

The WCFab 2017-2019 L5P Duramax 2500 / 3500 & 2019+ L5D Duramax 4500 / 5500 / 6500 Fabricated Aluminum Coolant Tank Kit, mounts in OEM coolant ...

The WCFab Splash Shield Kit for 2011-2019 Chevrolet Silverado 2500/3500 HD and GMC Sierra/Denali 2500/3500 HD trucks replaces the easily damaged fa...

Removing the OEM plastic lower bumper valance on the 2015-2019 Chevrolet Silverado 2500 / 3500 HD trucks is a proven method for improving ground cl...

The OEM resonator and middle boot joint for improved flow and durability and includes high quality reinforced silicone boots and stainless t-bolt c...

The OEM diameter and we experienced a 25HP Gain with our 4 in. turbo inlet when used with a Max Effort Tune. High quality hardware, silicone boot, ...

Stage 1 upgrade for the 2020-2025 L5P Duramax improves airflow between the turbo and engine for improved efficiency, throttle response, and turbo s...

Longer and Larger I.D. High-Pressure Line than the WCFab Street Series Kit and other CP3 Conversion Kits offered on the market which allows for mor...

The 3.5" High Flow Passenger Side Intercooler Pipe for 2020 and Newer L5P Duramax replaces the factory plastic two piece pipe with a high flow, 14 ...

The 3.5" High Flow Passenger Side Intercooler Pipe for 2020 and Newer L5P Duramax replaces the factory plastic two piece pipe with a high flow, 14 ...

WCFab's 2017-2025 L5P Duramax Billet Exhaust Manifolds replace the restrictive factory cast parts with high-strength, TIG-welded high-flow billet s...

The 3.5" High Flow Passenger (Cold) Side Intercooler Pipe Kit for 2006-2010 LBZ/LMM Duramax replaces the failure prone factory plastic piece with a...

The 3" High Flow Driver side Intercooler pipe for the 2020-2025 L5P Duramax. Replaces the factory two piece 2 1/2" inter cooler pipe with a high fl...

The 3" High Flow Driver side Intercooler pipe for the 2020-2025 L5P Duramax. Replaces the factory two piece 2 1/2" inter cooler pipe with a high fl...

WCFab's 2001-2016 Duramax Billet Exhaust Manifolds replace the restrictive factory cast parts with high-strength, TIG-welded high-flow billet steel...

The 3" High Flow Driver side Intercooler pipe for 2011-2016 LML Duramax replaces the factory two piece 2 1/2" pipe with a high flow one piece 3" pi...

The 3" High Flow Driver side Intercooler pipe for 2011-2016 LML Duramax replaces the factory two piece 2 1/2" pipe with a high flow one piece 3" pi...

The 3" High Flow Driver side Intercooler pipe for 2011-2016 LML Duramax replaces the factory two piece 2 1/2" pipe with a high flow one piece 3" pi...

The 3" High Flow Driver side Intercooler pipe for 2011-2016 LML Duramax replaces the factory two piece 2 1/2" pipe with a high flow one piece 3" pi...

LLY, LBZ, LMM Duramax 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 u...

LLY, LBZ, LMM Duramax 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 u...

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 filt...

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 filt...

1998.5-2007 5.9L Cummins Billet Intake Spacer Kit. This high flowing CNC machined billet aluminum plate allows maximum air flow from the intake hor...

The 3" High Flow Passenger Side Upper Crossover Intercooler Pipe for 2011-2016 LML Duramax provides a 20% increase in size over the OEM part allowi...

Cummins High Mount 2nd Gen Swap Oil Feed and Drain Line Kit, with extended oil drain fitting assembly. Teflon lined stainless steel braided #6 feed...

2011-2016 LML Crew Cab Duramax Fass Fuel System Relocation Mounting Bracket for Chevy Silverado or GMC Sierra 2500 / 3500 trucks. WCFab's precision...

WCFab 4" Turbo Down Pipe for 2004.5-2007 5.9L Cummins with High Mount style turbo on 2nd Gen style exhaust manifold allows for a quick and simple d...

The 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 faste...

WCFab's 2017-2025 L5P Duramax Billet Exhaust Manifolds replace the restrictive factory cast parts with high-strength, TIG-welded high-flow billet s...

Clean up the engine bay of your 1999-2025 GM 1500/2500/3500 truck with this anodized billet aluminum brake reservoir cap from WCFab. This is a comp...

Clean up the engine bay of your 1999-2025 GM 1500/2500/3500 truck with this anodized billet aluminum brake reservoir cap from WCFab. This is a comp...

Clean up the engine bay of your 2006-2024 Dodge Ram 2500/3500 5.9L or 6.7L Cummins truck with this custom powder coated fabricated aluminum brake r...

Clean up the engine bay of your 2001-2019 GM 2500/3500 Duramax truck with this custom powder coated fabricated aluminum brake reservoir cover from ...

Clean up the engine bay of your 2001-2019 GM 2500/3500 Duramax truck with this custom powder coated fabricated aluminum brake reservoir cover from ...

Clean up the engine bay of your 2001-2019 GM 2500/3500 Duramax truck with this custom powder coated fabricated aluminum brake reservoir cover from ...

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 a...

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 qualit...

This LBZ 3" Y-Bridge Kit is an upgraded high flow intake kit for the 2006-2007 LBZ Duramax which replaces the OEM upper intake manifold supplying a...

WCFab X Fleece Performance Engineering Thermostat Housing for 1998-2018 5.9L & 6.7L Cummins is a direct replacement upgrade for the unsightly O...

Replace the restrictive crushed factory down pipe on your 2017-2025 L5P Duramax with this 3.5" Down Pipe for improved exhaust flow. Connects to the...

Replace the restrictive crushed factory down pipe with this full 3" down pipe. For use with factory turbo or factory style drop in turbo. 2015.5 an...

Replace the restrictive crushed factory down pipe with this full 3" down pipe. High Temp Ceramic Coated for protection. For use with factory turbo ...

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 conne...