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The Wehrli L5P Duramax thermostat housing is a direct replacement for 2017–2025 6.6L Duramax applications, finished in flat black powder coat to clean up the engine bay and blend with existing components. It swaps in for the OEM housing without modification and is available in multiple powder-coat colors to match intake kits, intercooler piping and other WCFab coolant components for a coordinated, factory-installed look.
Wehrli L5P Duramax Thermostat Housing - Flat Black
