Sierra 18-1989 Thermostat Housing Stainless Steel

• Fits various Mercruiser GM 4.3L; 5.7L; 7.4L and 8.2L applications
• Stainless steel construction
• Includes inserts; pipe plugs & thermostat gasket
• Uses Sierra 18-1989K gasket service kit
• Replaces Mercury 87290A4; 8M0061381; & 861006A1

Replaces OEM part # MERCURY MARINE 860256A4 MERCURY MARINE 861006A MERCURY MARINE 87290A4