Wehrli

Billet Aluminum Black Anodized Coolant Plug for Duramax Engine Cover, for 1.1" bore. Includes high temperature silicone O-ring seal.

Built 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.

High quality preformed universal 1/2" heater hose assembly with billet aluminum quick-connect fitting replaces the leak prone OEM fitting. Servicable O-ring seals inside of billet fitting install...

LLY/LBZ/LMM/LML Duramax 3" Down pipe for S400 turbo with 4.6" Diameter flat exhaust outlet flange (Half marmon). This down pipe mates to the exhaust system v-band flange with OEM clamp for easy...

Heavy Duty Fabricated Turbo Pedestal allows you to mount a T4 flange style Turbo for custom build racing applications

This Thermostat Housing for 2017-2025 6.6L Duramax is a direct replacement upgrade for the unsightly OEM part. Comes powder coated in your choice of color to complement other WCFab upgrades such as...

Replacement O-Ring for S400 Compressor outlet flanges. Used with the following WCFab products: LB7 Duramax S400 Single Turbo Install Kit (WCF100489), 2004.5-2007 5.9L Cummins S400 High Mount 2nd Gen...

Maintenance - 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...

Maintenance - 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...

Water Resistant: Filter cover Hydrophobic treatment helps repel moisture and protect against water entering the engine due to puddle splash or heavy rainstorms. Although our Pre-Filters are proven to...

For use on all T4 Flange style exhaust housings found on S300, S400, garrett, holset, precision turbo chargers.

1/2" Thick steel Divided T4 Spacer Plate Kit, Ceramic Coated Black. Includes M10 Mounting Studs 1" long, nuts, washers, and two T4 Gaskets