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Heating and Cooling› Thermostats, Housings and Fillers

Wehrli

Thermostat Housing Kit 2001-2005 Duramax LB7/LLY Fine Texture Black

$489.00 $474.33 Save $14.67

SKU: W005 100405-FTB

In Stock
In Stock
Ships by Jun 12
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Wehrli Custom Fabrication Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit replaces OEM upper radiator hose and coolant return pipe, rerouting coolant for improved access to driver-side fuel system components, more room for larger aftermarket turbochargers, and updated engine bay appearance.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandWehrli
Part NumberW005 100405-FTB

Videos

WCFab 2001-10 LB7/LLY/LBZ/LMM Duramax Top Outlet Billet Thermostat Housing & Upper Coolant Pipe Kit

WCFab 2001-10 LB7/LLY/LBZ/LMM Duramax Top Outlet Billet Thermostat Housing & Upper Coolant Pipe Kit
Duramax Upper Coolant Pipe Replacements

Duramax Upper Coolant Pipe Replacements

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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