Warm engine coolant quickly with the Phillips & Temro Hot Fox In-Tank Fuel Warmer. In-tank fuel warmers are easily installed directly into the fuel tank. Maximize efficiency by selecting the longest Hot Fox fuel warmer available for the applicable tank size. Hot Fox In-Tank Fuel Warmers feature a stainless steel design and all-welded construction. The device rotates for easy mounting. The Hot Fox fuel warmer can also be purchased with an auxiliary standpipe. This product combines heated fuel standpipes and an accessory fuel supply with an in-tank fuel heater.