Stainless thermostat housing fits various Mercruiser GM 4.3L, 5.7L, 7.4L and 8.2L marine engines

• 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