- For use in Big Block and Small Block Chevy Mercruiser Applications
- Constructed of Cast Stainless Steel.
- Replaces factory black cast iron MerCruiser housing.
- Designed to work in conjunction with the factory circulating pump.
- Can be used in low profile applications such as EFI engines etc.
- Thermosat NOT Included.
- Works with Mercruiser 860256A4 MCM & MIE V6 – V8 (305 & 350cid) w/Bravo Drive
- Replaces Sierra 18-1989 and 18-3530-1