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The WCFab thermostat housing for 2017–2025 6.6L L5P Duramax is a direct replacement that refreshes engine bay styling and pairs with WCFab cooling and intake components. Powder-coated in Brizzle Blue, it installs in place of the factory housing to maintain coolant routing while providing a coordinated, finished look. A straightforward swap to improve engine bay appearance.
Wehrli L5P Duramax Thermostat Housing - Brizzle Blue
