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The Wehrli L5P Duramax thermostat housing is a direct replacement for 2017–2025 6.6L Duramax applications, finished in illusion purple powder coat to clean up the engine bay and pair with other WCFab upgrades. It installs in place of the OEM housing with no modification and is available in several powder-coat finishes to coordinate with intake kits, intercooler piping and coolant tank pieces for a cohesive, finished look.
Wehrli L5P Duramax Thermostat Housing - Illusion Purple
