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The Wehrli L5P Duramax thermostat housing is a direct replacement for 2017–2025 6.6L Duramax applications, finished in WCFab grey powder coat to clean up the engine bay and match other WCFab upgrades. It swaps in for the OEM housing without modification and is available in multiple powder-coat colors to coordinate with intake kits, intercooler piping and coolant tank pieces, delivering a neat, factory-inspired appearance under the hood.
Wehrli L5P Duramax Thermostat Housing - WCFab Grey
