Home / Engine / Kat’s K4B frost plug engine heater View cart “Preferred TH18 thermostat” has been added to your cart. Kat’s K4B frost plug engine heater$12.00 1 in stock Kat's K4B frost plug engine heater quantity Add to cart SKU: ENG-MB-006 Category: Engine Description Description Kat’s K4B frost plug engine heater – SKU ENG-MB-006 New Old Stock Kat’s K4B frost plug engine heater – pulled from the inventory of Merchand Brothers, long-time independent mechanics in White River Junction, Vt. Related products Subaru X1321AA999 gasket set $15.00 Add to cart Repco 151-2000 external fuel pump $25.00 Add to cart SPM 60695 gasket $1.50 Add to cart Honda 11200-P3F-000 oil pan $125.00 Add to cart