Premium Thermostat Housing Gasket for Cummins ISX QSX 3684336
High-density molded rubber construction ensures superior heat resistance and long-term durability under extreme engine conditions. Precision-engineered for exact fitment to Cummins ISX QSX engines, eliminating coolant leaks and maintaining optimal engine temperature. Advanced multi-layer design with reinforced fiber core resists cracking and deformation under high-pressure cycles. Direct OEM replacement (Part #3684336) for seamless compatibility with no modifications required. Ideal for heavy-duty trucks, industrial machinery, and marine applications where reliable thermal regulation is critical. Manufactured with strict ISO quality control for consistent performance in -40°F to 300°F environments. Globally sourced materials paired with automated production guarantee unbeatable wholesale pricing. Bulk orders available with same-day shipping from our cross-border warehouses.