1997-2003 C5 ACDelco 187-Degree Thermostat Assembly - OEM Number(s) (12571261)
This 187-degree thermostat is a direct replacement for the factory unit on 1997-2003 LS1 and LS6 equipped Corvettes and helps keep engine temperatures stable where they should be. Maintaining proper operating temperature is critical for performance, fuel efficiency, and long-term engine health, especially on cars that see spirited driving. This kit includes the thermostat, water inlet housing, and gasket, so you are not reusing old parts that can cause leaks or inconsistent cooling. It is a simple bolt-on solution that restores reliable cooling system operation and gives you peace of mind whether you are cruising, commuting, or leaning into the throttle.
- Direct replacement 187 degree thermostat for 1997-2003 Corvette LS1 and LS6 engines
- Helps maintain proper engine operating temperature for performance and reliability
- Includes thermostat housing water inlet and gasket for a complete install
- Prevents overheating and inconsistent coolant flow caused by worn original parts
- Ideal for stock refresh or preventative maintenance on C5 Corvettes
Also known under these part numbers: (For reference only)
- 021625871288
- 12571261
- 15-10412