Home / Engine / Preferred TH18 thermostat “Kat’s K4B frost plug engine heater” has been added to your cart. View cart Preferred TH18 thermostat$2.50 4 in stock Preferred TH18 thermostat quantity Add to cart SKU: ENG-MB-007 Category: Engine Description Preferred TH18 thermostat – SKU ENG-MB-007 New Old Stock Preferred TH18 195-degree thermostat – pulled from the inventory of Merchand Brothers, long-time independent mechanics in White River Junction, Vt. Related products SPM 60749 gasket $1.00 Add to cart SPM 60742 gasket $1.00 Add to cart Honda 11200-P3F-000 oil pan $125.00 Add to cart Subaru 806738040 oil seal $3.50 Add to cart