Milodon 16405 160&rsquo; High Flow Thermostat &ndash; Chrysler Slant 6, 273-360 and 383-440 A high quality part, Made In America that wont leave you stuck out on the road Designed for improved performance in street cars and heavy duty use "Balanced Sleeve" design prevents improper closure by higher water volumes Will give consistently cooler engine when used with a clean radiator with adequate airflow 90 day limited warranty by the manufacturer