Maintain optimal engine temperature with this thermostat, a premium replacement for Cumins 5273379, designed for Cumins ISC 8.3L and ISL 8.9L engines in Stage 2 Automotive applications, used in Freightliner, Kentworth, Peterbuilt, and Vlvo heavy-duty trucks. This thermostat, measuring 3.5 x 2.25 x 3.25 inches and weighing 0.36 lbs, features a 180?F (82?C) opening temperature and is constructed from high-quality metal with a rubber seal to regulate coolant flow, preventing overheating and ensuring efficient engine performance. It fits or replaces parts from Cumins, and others, including cross-references like Cumins 4936026, 4992231, 5265799, and 181928. Ideal for fleet maintenance, this thermostat reduces downtime and costs, providing reliable temperature control in demanding conditions.