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The WCFab thermostat housing for 2017–2025 6.6L L5P Duramax is a direct replacement that tidies the engine bay and pairs with other WCFab upgrades. Powder-coated in Bronze Chrome to match surrounding components, it installs in place of the OEM housing and helps clean up engine bay appearance while preserving stock coolant routing. Intended as a straightforward replacement for stock housings.
Wehrli L5P Duramax Thermostat Housing - Bronze Chrome
