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The Wehrli L5P Duramax thermostat housing is a direct replacement for 2017–2025 6.6L Duramax applications, finished in sparkle copper powder coat to tidy the engine bay and match WCFab upgrades. It swaps in for the OEM housing without modification and is available in multiple powder-coat finishes to coordinate with intake kits, intercooler piping and coolant tank components for a cohesive, dressed-up look.
Wehrli L5P Duramax Thermostat Housing - Sparkle Copper
