Spacer, GM LT4 TheromostatThis GM LT4 Thermostat Spacer is a precision machined aluminum component designed to ensure correct thermostat positioning within the housing on LT4 based marine engines. Proper spacing is critical for maintaining a tight seal, accurate coolant routing, and consistent operating temperaturesespecially in high performance applications like Malibus Monsoon and GM based powertrains. Over time, heat cycles and service work can lead to improper fitment or