Wehrli Custom Fabrication 2001-2004 LB7 Duramax S400 Single Turbo Install Kit - WCF100489

This kit will allow you to install an S400-based Turbo on your LB7 Duramax. Replacing all OEM plumbing and y-bridge with high flow 3" diameter piping. Oil Lines are high-quality stainless steel braided Parker Lines with the oil feed line routing from the main oil galley on the side of the engine block. We designed our down pipe to connect with your exhaust system V-Band and clamp, which simplifies installation and does not require you to cut your exhaust system.
If you are not purchasing the turbo from us, you must specify the brand you are using. Some Turbo's you may be required to ship to use for mock-up to build the kit.



Includes Driver Side Transmission Dipstick Tube, making installing the down pipe easier.

NOTE: Turbo Downpipe is designed for Half Marmon style S400 exhaust outlet, which measures 4.6" Diameter flat flange. NOT compatible with HX40 style exhaust outlet flanges.

Race cover style or SXE turbochargers will require a forward-facing VAN style thermostat housing and hose, sold separately.

The OEM turbo coolant feed port on the upper radiator pipe from the thermostat housing will interfere with the larger WCFAB Turbo Intake in this Kit. You MUST use a WCFAB Billet forward-facing thermostat housing Kit WCF100405 or our Modified OEM Pipe WCF100797. Billet Coolant Port Block Off Plugs DO NOT allow enough room for clearance on LB7 Models.