160°F Drilled Engine Thermostat - Indmar LT1 & 5.7L

Restore proper engine operating temperature with this 160°F drilled thermostat designed for Indmar marine engine cooling systems. Built for consistent flow and reliable regulation, this thermostat is commonly used on LT1 engines in the top housing and on 5.7L closed-cooled engines. The drilled design helps maintain steady coolant circulation to reduce temperature spikes and promote stable warm-up characteristics—ideal for service replacements and routine cooling-system maintenance.

• Temperature rating: 160°F
• Design: Drilled thermostat for controlled bypass/bleed flow
• Applications: LT1 (top housing) and 5.7L closed-cooled engines
• Category: Marine engine service part / cooling system component
• Brand/Vendor: Indmar

Fitment note: Verify your engine model and thermostat housing style (top housing) before ordering to ensure compatibility with your cooling system configuration.