This Jeep Wrangler TJ LJ Heater Core HVAC Box with AC is a high-quality replacement part designed for easy installation without the need for drilling or modifications. It is made of durable aluminum, copper, and plastic materials that have been tested for durability and 100% leak-free operation. The mounting style of this heater core is bolt-on, and it comes with all necessary mounting hardware included. This product is a genuine OEM part with a 3-month manufacturer warranty. It is compatible with 2003-2005 Jeep Wrangler TJ and LJ models and can be used to replace the original equipment manufacturer part number 55037603AA.