wehrli

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...

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...

The WCFab L5P 4 in. High Flow Cast Aluminum Turbo Intake Horn for 2017-2025 Chevrolet Silverado or GMC 2500 / 3500 HD trucks equipped with the 6.6L...

The WCFab L5P 4 in. High Flow Cast Aluminum Turbo Intake Horn for 2017-2025 Chevrolet Silverado or GMC 2500 / 3500 HD trucks equipped with the 6.6L...

The WCFab L5P 4 in. High Flow Cast Aluminum Turbo Intake Horn for 2017-2025 Chevrolet Silverado or GMC 2500 / 3500 HD trucks equipped with the 6.6L...

The WCFab L5P 4 in. High Flow Cast Aluminum Turbo Intake Horn for 2017-2025 Chevrolet Silverado or GMC 2500 / 3500 HD trucks equipped with the 6.6L...

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

Contains one 2.375" x 3" ID Silicone Reducer Boot 4.5" Long with Logo, one 3" T-Bolt Clamp and one 2.375-2.5" T-Bolt Clamp. Qty. 1 of 2.375" x 3" I...

WCFab's 4" High flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts...

WCFab's 4" High flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts...

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...

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 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, ...

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 ...

High flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on the 202...

High flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on the 202...

High flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on the 202...

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, ...

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, ...

Built 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 en...

2020-2025 L5P Duramax Fabricated Aluminum Coolant Tank Kit, mounts in OEM coolant tank location. - - Dress up your engine bay by replacing the ugly...

2020-2025 L5P Duramax Fabricated Aluminum Coolant Tank Kit, mounts in OEM coolant tank location. - - Dress up your engine bay by replacing the ugly...

High flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on the 202...

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

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

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

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

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, ...

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

2020-2025 Silverado and Sierra 2500HD / 3500HD CNC machined billet aluminum spacer kits from WCFab move the front bumper forward off the frame horn...

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, ...

18-20PSI Optional Replacement Coolant Tank Cap, Clear Anodized. Used on WCFab Fabricated Coolant Tanks on 2001+ Duramax or 2004.5-07 & 2010-202...

Clean 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 Alum...

Clean 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 Alum...

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...

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...

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 remov...

Upper Coolant Pipe for 2020-2025 L5P 6.6L Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 truck replaces the ugly OEM rubber upper r...

Upper Coolant Pipe for 2020-2025 L5P 6.6L Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 truck replaces the ugly OEM rubber upper r...

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...

6.7L Cummins Thick Flange #12 JIC Male Fitting for Coolant Port Behind Water Pump. Press Fit Connection with High Temp O-Ring Seal and Mounting Bol...

6.7L Cummins Thin Flange #10 JIC Male Fitting for Coolant Port Behind Water Pump. Press Fit Connection with High Temp O-Ring Seal and Mounting Bolt...

Clean up the engine bay of your 1998-2024 Dodge Ram 2500/3500 5.9L or 6.7L Cummins truck with this anodized billet aluminum brake reservoir cap fro...

Clean up the engine bay of your 1998-2024 Dodge Ram 2500/3500 5.9L or 6.7L Cummins truck with this anodized billet aluminum brake reservoir cap fro...

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...

Clean up the engine bay of your 1998.5-2024 Cummins with this Billet Aluminum Clear Anodized Oil Fill Cap from WCFab. This is a complete cap, not a...